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Finding the Fourth Proportional to 80,863.90, 121,279.65 and 38,743.90

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Solution

The fourth proportional to 80,863.90, 121,279.65 and 38,743.90 is: 58,108.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,863.90 : 121,279.65 = 38,743.90 : x
  2. Step 2: Convert to fraction form
    80,863.90/121,279.65 = 38,743.90/x
  3. Step 3: Cross multiply
    80,863.90x = 121,279.65 × 38,743.90
  4. Step 4: Simplify right side
    80,863.90x = 4,698,846,631.64
  5. Step 5: Solve for x
    x = 4,698,846,631.64/80,863.90
  6. Step 6: Final answer
    x = 58,108.09

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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.