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Finding the Fourth Proportional to 138,620.37, 207,956.16 and 43,874.40

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Solution

The fourth proportional to 138,620.37, 207,956.16 and 43,874.40 is: 65,819.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,620.37 : 207,956.16 = 43,874.40 : x
  2. Step 2: Convert to fraction form
    138,620.37/207,956.16 = 43,874.40/x
  3. Step 3: Cross multiply
    138,620.37x = 207,956.16 × 43,874.40
  4. Step 4: Simplify right side
    138,620.37x = 9,123,951,746.30
  5. Step 5: Solve for x
    x = 9,123,951,746.30/138,620.37
  6. Step 6: Final answer
    x = 65,819.70

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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.