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Finding the Fourth Proportional to 71,375.88, 107,059.50 and 18,785.28

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Solution

The fourth proportional to 71,375.88, 107,059.50 and 18,785.28 is: 28,176.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,375.88 : 107,059.50 = 18,785.28 : x
  2. Step 2: Convert to fraction form
    71,375.88/107,059.50 = 18,785.28/x
  3. Step 3: Cross multiply
    71,375.88x = 107,059.50 × 18,785.28
  4. Step 4: Simplify right side
    71,375.88x = 2,011,142,684.16
  5. Step 5: Solve for x
    x = 2,011,142,684.16/71,375.88
  6. Step 6: Final answer
    x = 28,176.78

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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.