Abase of a parallelogram is on the x-axis and the origin is located at the left endpoint of that base. three consecutive vertices are (h, j), (0, 0), and (k, 0), where h > 0. what is the x-coordinate of the fourth vertex?

The x-coordinate will be h+k.

The point (k, 0) is k units horizontally away from 0.  In order to make both sides of the figure parallel, the length of the top base will need to be the same as the length of the bottom base; this means that the fourth vertex will need to be k units away from h.

59/96 is the ratio hope this not 100% sure though : /