Question

How to solve the whole thing I'm lost

Answer 1

Divide 61.5 by three so you know how much each quarter is.
61.5/3=20.5
And then add that number to 61.5 so that you have all four quarters
20.5+61.5=82
So he only has 20.5 miles more to get home and he will have traveled 82 miles in all when he gets home.

Answer 2

61.5x=3/4
246=3x
82=x
82 is the answer