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Finding the Fourth Proportional to 71,687.67, 107,531.51 and 21,767.55

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Solution

The fourth proportional to 71,687.67, 107,531.51 and 21,767.55 is: 32,651.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,687.67 : 107,531.51 = 21,767.55 : x
  2. Step 2: Convert to fraction form
    71,687.67/107,531.51 = 21,767.55/x
  3. Step 3: Cross multiply
    71,687.67x = 107,531.51 × 21,767.55
  4. Step 4: Simplify right side
    71,687.67x = 2,340,697,520.50
  5. Step 5: Solve for x
    x = 2,340,697,520.50/71,687.67
  6. Step 6: Final answer
    x = 32,651.33

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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.