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Finding the Fourth Proportional to 92,590.38, 138,863.70 and 42,639.30

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Solution

The fourth proportional to 92,590.38, 138,863.70 and 42,639.30 is: 63,948.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,590.38 : 138,863.70 = 42,639.30 : x
  2. Step 2: Convert to fraction form
    92,590.38/138,863.70 = 42,639.30/x
  3. Step 3: Cross multiply
    92,590.38x = 138,863.70 × 42,639.30
  4. Step 4: Simplify right side
    92,590.38x = 5,921,050,963.41
  5. Step 5: Solve for x
    x = 5,921,050,963.41/92,590.38
  6. Step 6: Final answer
    x = 63,948.88

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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.