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Finding the Fourth Proportional to 71,375.52, 107,055 and 18,789.11

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Solution

The fourth proportional to 71,375.52, 107,055 and 18,789.11 is: 28,181.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,375.52 : 107,055 = 18,789.11 : x
  2. Step 2: Convert to fraction form
    71,375.52/107,055 = 18,789.11/x
  3. Step 3: Cross multiply
    71,375.52x = 107,055 × 18,789.11
  4. Step 4: Simplify right side
    71,375.52x = 2,011,468,171.05
  5. Step 5: Solve for x
    x = 2,011,468,171.05/71,375.52
  6. Step 6: Final answer
    x = 28,181.49

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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.