Finding the Fourth Proportional to 100.75, 150.83 and 71.77

Step by Step Solution

1. Step 1: Write the proportion equation
   100.75 : 150.83 = 71.77 : x
2. Step 2: Convert to fraction form
   100.75/150.83 = 71.77/x
3. Step 3: Cross multiply
   100.75x = 150.83 × 71.77
4. Step 4: Simplify right side
   100.75x = 10,825.25
5. Step 5: Solve for x
   x = 10,825.25/100.75
6. Step 6: Final answer
   x = 107.45