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Finding the Fourth Proportional to 100,737.20, 151,105.80 and 71,212.70

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Solution

The fourth proportional to 100,737.20, 151,105.80 and 71,212.70 is: 106,819.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,737.20 : 151,105.80 = 71,212.70 : x
  2. Step 2: Convert to fraction form
    100,737.20/151,105.80 = 71,212.70/x
  3. Step 3: Cross multiply
    100,737.20x = 151,105.80 × 71,212.70
  4. Step 4: Simplify right side
    100,737.20x = 10,760,652,003.66
  5. Step 5: Solve for x
    x = 10,760,652,003.66/100,737.20
  6. Step 6: Final answer
    x = 106,819.05

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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.