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Finding the Fourth Proportional to 63,690.14, 87,892.82 and 39,830.78

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Solution

The fourth proportional to 63,690.14, 87,892.82 and 39,830.78 is: 54,966.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,690.14 : 87,892.82 = 39,830.78 : x
  2. Step 2: Convert to fraction form
    63,690.14/87,892.82 = 39,830.78/x
  3. Step 3: Cross multiply
    63,690.14x = 87,892.82 × 39,830.78
  4. Step 4: Simplify right side
    63,690.14x = 3,500,838,938.38
  5. Step 5: Solve for x
    x = 3,500,838,938.38/63,690.14
  6. Step 6: Final answer
    x = 54,966.74

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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.