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Finding the Fourth Proportional to 138,720.30, 207,937.89 and 59,767.98

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Solution

The fourth proportional to 138,720.30, 207,937.89 and 59,767.98 is: 89,590.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,720.30 : 207,937.89 = 59,767.98 : x
  2. Step 2: Convert to fraction form
    138,720.30/207,937.89 = 59,767.98/x
  3. Step 3: Cross multiply
    138,720.30x = 207,937.89 × 59,767.98
  4. Step 4: Simplify right side
    138,720.30x = 12,428,027,650.76
  5. Step 5: Solve for x
    x = 12,428,027,650.76/138,720.30
  6. Step 6: Final answer
    x = 89,590.55

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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.