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Finding the Fourth Proportional to 72,122.49, 108,251.01 and 36,609.03

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Solution

The fourth proportional to 72,122.49, 108,251.01 and 36,609.03 is: 54,947.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,122.49 : 108,251.01 = 36,609.03 : x
  2. Step 2: Convert to fraction form
    72,122.49/108,251.01 = 36,609.03/x
  3. Step 3: Cross multiply
    72,122.49x = 108,251.01 × 36,609.03
  4. Step 4: Simplify right side
    72,122.49x = 3,962,964,472.62
  5. Step 5: Solve for x
    x = 3,962,964,472.62/72,122.49
  6. Step 6: Final answer
    x = 54,947.69

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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.