Find the fourth proportional to the numbers 36, 48 and 90.

Sure, to find the fourth proportional to the numbers 36, 48, and 90, you need to follow these steps:

Step 1: Understand the concept of proportionality. If a:b = c:d, then d is the fourth proportional to a, b, c.

Step 2: Substitute the given values into the formula. In this case, a=36, b=48, and c=90. We need to find d.

Step 3: Rearrange the formula to solve for d. The formula becomes d = (b*c)/a.

Step 4: Substitute the given values into the formula. d = (48*90)/36.

Step 5: Calculate the value. d = 4320/36 = 120.

So, the fourth proportional to the numbers 36, 48, and 90 is 120.