Finding the Fourth Proportional to 67.30, 100.85 and 50.25

Step by Step Solution

1. Step 1: Write the proportion equation
   67.30 : 100.85 = 50.25 : x
2. Step 2: Convert to fraction form
   67.30/100.85 = 50.25/x
3. Step 3: Cross multiply
   67.30x = 100.85 × 50.25
4. Step 4: Simplify right side
   67.30x = 5,067.71
5. Step 5: Solve for x
   x = 5,067.71/67.30
6. Step 6: Final answer
   x = 75.30