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Finding the Fourth Proportional to 138,520.80, 207,632.16 and 59,672.16

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Solution

The fourth proportional to 138,520.80, 207,632.16 and 59,672.16 is: 89,444.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,520.80 : 207,632.16 = 59,672.16 : x
  2. Step 2: Convert to fraction form
    138,520.80/207,632.16 = 59,672.16/x
  3. Step 3: Cross multiply
    138,520.80x = 207,632.16 × 59,672.16
  4. Step 4: Simplify right side
    138,520.80x = 12,389,859,472.67
  5. Step 5: Solve for x
    x = 12,389,859,472.67/138,520.80
  6. Step 6: Final answer
    x = 89,444.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.