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Finding the Fourth Proportional to 71,701.26, 107,551.85 and 21,781.16

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Solution

The fourth proportional to 71,701.26, 107,551.85 and 21,781.16 is: 32,671.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,701.26 : 107,551.85 = 21,781.16 : x
  2. Step 2: Convert to fraction form
    71,701.26/107,551.85 = 21,781.16/x
  3. Step 3: Cross multiply
    71,701.26x = 107,551.85 × 21,781.16
  4. Step 4: Simplify right side
    71,701.26x = 2,342,604,053.15
  5. Step 5: Solve for x
    x = 2,342,604,053.15/71,701.26
  6. Step 6: Final answer
    x = 32,671.73

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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.