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Finding the Fourth Proportional to 92,422.62, 138,711.69 and 86,590.62

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Solution

The fourth proportional to 92,422.62, 138,711.69 and 86,590.62 is: 129,958.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,422.62 : 138,711.69 = 86,590.62 : x
  2. Step 2: Convert to fraction form
    92,422.62/138,711.69 = 86,590.62/x
  3. Step 3: Cross multiply
    92,422.62x = 138,711.69 × 86,590.62
  4. Step 4: Simplify right side
    92,422.62x = 12,011,131,238.35
  5. Step 5: Solve for x
    x = 12,011,131,238.35/92,422.62
  6. Step 6: Final answer
    x = 129,958.78

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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.