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Finding the Fourth Proportional to 80,113.70, 120,134.10 and 42,664.16

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Solution

The fourth proportional to 80,113.70, 120,134.10 and 42,664.16 is: 63,976.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,113.70 : 120,134.10 = 42,664.16 : x
  2. Step 2: Convert to fraction form
    80,113.70/120,134.10 = 42,664.16/x
  3. Step 3: Cross multiply
    80,113.70x = 120,134.10 × 42,664.16
  4. Step 4: Simplify right side
    80,113.70x = 5,125,420,463.86
  5. Step 5: Solve for x
    x = 5,125,420,463.86/80,113.70
  6. Step 6: Final answer
    x = 63,976.83

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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.