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Finding the Fourth Proportional to 133,229.20, 199,843.80 and 71,021.20

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Solution

The fourth proportional to 133,229.20, 199,843.80 and 71,021.20 is: 106,531.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,229.20 : 199,843.80 = 71,021.20 : x
  2. Step 2: Convert to fraction form
    133,229.20/199,843.80 = 71,021.20/x
  3. Step 3: Cross multiply
    133,229.20x = 199,843.80 × 71,021.20
  4. Step 4: Simplify right side
    133,229.20x = 14,193,146,488.56
  5. Step 5: Solve for x
    x = 14,193,146,488.56/133,229.20
  6. Step 6: Final answer
    x = 106,531.80

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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.