To find a relative date 100 days in the future from 24th July, you can manually calculate it by adding 100 days to the given date. Start by adding 30 days to get to 24th August, then another 30 days to reach 24th September, and finally, add 40 days to arrive at the date 24th October. In this case, the relative date 100 days in the future from 24th July is 24th October.