Finding the Fourth Proportional to 101.25, 151.91 and 67.15

Step by Step Solution

1. Step 1: Write the proportion equation
   101.25 : 151.91 = 67.15 : x
2. Step 2: Convert to fraction form
   101.25/151.91 = 67.15/x
3. Step 3: Cross multiply
   101.25x = 151.91 × 67.15
4. Step 4: Simplify right side
   101.25x = 10,200.76
5. Step 5: Solve for x
   x = 10,200.76/101.25
6. Step 6: Final answer
   x = 100.75