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Finding the Fourth Proportional to 83,779, 125,691.18 and 28,375

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Solution

The fourth proportional to 83,779, 125,691.18 and 28,375 is: 42,570.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,779 : 125,691.18 = 28,375 : x
  2. Step 2: Convert to fraction form
    83,779/125,691.18 = 28,375/x
  3. Step 3: Cross multiply
    83,779x = 125,691.18 × 28,375
  4. Step 4: Simplify right side
    83,779x = 3,566,487,232.50
  5. Step 5: Solve for x
    x = 3,566,487,232.50/83,779
  6. Step 6: Final answer
    x = 42,570.18

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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.