Filter Match Me Results by radius

Hello,

I am presently busy to create a website where people find matches based on needs and offers (similar like interests).
Another point of concern is now how to get the feature, users can set a distance radius from their profile location and filter the matches.
This would be my last problem upon creating the full website and put it online.
It would be even amazing to show them on Google Maps or another map.

Thanks in advance!