Finding the Fourth Proportional to 155.50, 231.98 and 149.89

Step by Step Solution

1. Step 1: Write the proportion equation
   155.50 : 231.98 = 149.89 : x
2. Step 2: Convert to fraction form
   155.50/231.98 = 149.89/x
3. Step 3: Cross multiply
   155.50x = 231.98 × 149.89
4. Step 4: Simplify right side
   155.50x = 34,771.48
5. Step 5: Solve for x
   x = 34,771.48/155.50
6. Step 6: Final answer
   x = 223.62