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Finding the Fourth Proportional to 71,554.38, 107,338.92 and 18,963.87

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Solution

The fourth proportional to 71,554.38, 107,338.92 and 18,963.87 is: 28,447.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,554.38 : 107,338.92 = 18,963.87 : x
  2. Step 2: Convert to fraction form
    71,554.38/107,338.92 = 18,963.87/x
  3. Step 3: Cross multiply
    71,554.38x = 107,338.92 × 18,963.87
  4. Step 4: Simplify right side
    71,554.38x = 2,035,561,324.82
  5. Step 5: Solve for x
    x = 2,035,561,324.82/71,554.38
  6. Step 6: Final answer
    x = 28,447.75

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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.