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Finding the Fourth Proportional to 62,861.80, 86,727.70 and 38,979.88

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Solution

The fourth proportional to 62,861.80, 86,727.70 and 38,979.88 is: 53,778.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,861.80 : 86,727.70 = 38,979.88 : x
  2. Step 2: Convert to fraction form
    62,861.80/86,727.70 = 38,979.88/x
  3. Step 3: Cross multiply
    62,861.80x = 86,727.70 × 38,979.88
  4. Step 4: Simplify right side
    62,861.80x = 3,380,635,338.68
  5. Step 5: Solve for x
    x = 3,380,635,338.68/62,861.80
  6. Step 6: Final answer
    x = 53,778.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.