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Finding the Fourth Proportional to 137,710.10, 207,002.55 and 129,836.90

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Solution

The fourth proportional to 137,710.10, 207,002.55 and 129,836.90 is: 195,167.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,710.10 : 207,002.55 = 129,836.90 : x
  2. Step 2: Convert to fraction form
    137,710.10/207,002.55 = 129,836.90/x
  3. Step 3: Cross multiply
    137,710.10x = 207,002.55 × 129,836.90
  4. Step 4: Simplify right side
    137,710.10x = 26,876,569,384.10
  5. Step 5: Solve for x
    x = 26,876,569,384.10/137,710.10
  6. Step 6: Final answer
    x = 195,167.74

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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.