Finding the Fourth Proportional to 150.15, 225.25 and 78.00

Step by Step Solution

1. Step 1: Write the proportion equation
   150.15 : 225.25 = 78.00 : x
2. Step 2: Convert to fraction form
   150.15/225.25 = 78.00/x
3. Step 3: Cross multiply
   150.15x = 225.25 × 78.00
4. Step 4: Simplify right side
   150.15x = 17,568.18
5. Step 5: Solve for x
   x = 17,568.18/150.15
6. Step 6: Final answer
   x = 117.01