Cute fabric! 4 yards is very long for a throw. I would cut it 4 or 5' long, add a 2" border in one of the solids in the print - a darker one would be my preference. Then I would use some of the remaining fabric to add a 2nd 4 - 6" border to that, and bind with the dark color you chose for the first border.
If my math is right, 4' + 8" all around would make a 64 " long x 52 wide. 5' x 36 + 8" all around would be 76" long. by 52" wide. If you want it wider, then you could cut the width of the fabric 3 x and add 2" sashing in the darker color - that would add 4" in width. Or just make the second border wider.
Thanks for asking; I had fun laying it out in my head! Can't wait to see what you actually do!