The true ratio is probably somewhere between 0.76 and 0.38
Before starting to speak of the true ratio, you really should examine your data source a bit more carefully.
Your link leads to a non-academic article which quotes numbers from opinion surveys and there's little information on those. In particular, the question of how representative their data sample was is kinda important. To make an obvious observation, people living in big cities probably (correctly) fear crime more than people living in rural communities. Therefore the reported average fear of crime will be greatly affected by how urbanized your sample is.
Another point is that your Table 2 does not give numbers about people who worry about rape. It gives numbers about people who worry about "yourself or someone in your family getting sexually assaulted or raped" (emphasis mine). And "sexual assault" is a fuzzy term which might, depending on who and how you ask, include things like catcalls and leery glances. And boyfriends. Plus, to continue my example, probably every parent with a teenage daughter answered "pretty frequently" to this question.
P.S. Also the numbers are from 1993. The overall crime rate in the US has dropped hugely since then.
Yes, I'm aware that these sources are far from perfect. I just did a quick google search and threw out the the first numbers I could easily get my hands on, as a quick sanity-check. Obviously it's far from a definitive answer.
You're free to look for better data; I'll probably do a little more poking around myself.
A long blog post explains why the author, a feminist, is not comfortable with the rationalist community despite thinking it is "super cool and interesting". It's directed specifically at Yvain, but it's probably general enough to be of some interest here.
http://apophemi.wordpress.com/2014/01/04/why-im-not-on-the-rationalist-masterlist/
I'm not sure if I can summarize this fairly but the main thrust seems to be that we are overly willing to entertain offensive/taboo/hurtful ideas and this drives off many types of people. Here's a quote:
The author perceives a link between LW type open discourse and danger to minority groups. I'm not sure whether that's true or not. Take race. Many LWers are willing to entertain ideas about the existence and possible importance of average group differences in psychological traits. So, maybe LWers are racists. But they're racists who continually obsess over optimizing their philanthropic contributions to African charities. So, maybe not racists in a dangerous way?
An overly rosy view, perhaps, and I don't want to deny the reality of the blogger's experience. Clearly, the person is intelligent and attracted to some aspects of LW discourse while turned off by other aspects.