Game wardens use experiments to help determine the number of wild horses in a national park. Suppose 40 wild horses are caught, tagged, and released back into the national park. Two weeks later 100 wild horses are caught, 4 of which are found to have tags. Using this information, estimate the number of wild horses in the national park.
36 wild horses
1,000 wild horses
136 wild horses
4,000 wild horses