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Finding the Fourth Proportional to 86,260.32, 129,390.40 and 38,819.96

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Solution

The fourth proportional to 86,260.32, 129,390.40 and 38,819.96 is: 58,229.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,260.32 : 129,390.40 = 38,819.96 : x
  2. Step 2: Convert to fraction form
    86,260.32/129,390.40 = 38,819.96/x
  3. Step 3: Cross multiply
    86,260.32x = 129,390.40 × 38,819.96
  4. Step 4: Simplify right side
    86,260.32x = 5,022,930,152.38
  5. Step 5: Solve for x
    x = 5,022,930,152.38/86,260.32
  6. Step 6: Final answer
    x = 58,229.90

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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.