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Finding the Fourth Proportional to 71,589.75, 107,363.97 and 21,658.11

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Solution

The fourth proportional to 71,589.75, 107,363.97 and 21,658.11 is: 32,480.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,589.75 : 107,363.97 = 21,658.11 : x
  2. Step 2: Convert to fraction form
    71,589.75/107,363.97 = 21,658.11/x
  3. Step 3: Cross multiply
    71,589.75x = 107,363.97 × 21,658.11
  4. Step 4: Simplify right side
    71,589.75x = 2,325,300,672.30
  5. Step 5: Solve for x
    x = 2,325,300,672.30/71,589.75
  6. Step 6: Final answer
    x = 32,480.92

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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.