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Finding the Fourth Proportional to 71,338.48, 107,008.26 and 18,747.88

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Solution

The fourth proportional to 71,338.48, 107,008.26 and 18,747.88 is: 28,121.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,338.48 : 107,008.26 = 18,747.88 : x
  2. Step 2: Convert to fraction form
    71,338.48/107,008.26 = 18,747.88/x
  3. Step 3: Cross multiply
    71,338.48x = 107,008.26 × 18,747.88
  4. Step 4: Simplify right side
    71,338.48x = 2,006,178,017.49
  5. Step 5: Solve for x
    x = 2,006,178,017.49/71,338.48
  6. Step 6: Final answer
    x = 28,121.96

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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.