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Finding the Fourth Proportional to 92,815.92, 139,909.44 and 87,397.20

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Solution

The fourth proportional to 92,815.92, 139,909.44 and 87,397.20 is: 131,741.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,815.92 : 139,909.44 = 87,397.20 : x
  2. Step 2: Convert to fraction form
    92,815.92/139,909.44 = 87,397.20/x
  3. Step 3: Cross multiply
    92,815.92x = 139,909.44 × 87,397.20
  4. Step 4: Simplify right side
    92,815.92x = 12,227,693,309.57
  5. Step 5: Solve for x
    x = 12,227,693,309.57/92,815.92
  6. Step 6: Final answer
    x = 131,741.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.