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Finding the Fourth Proportional to 81,092.73, 121,625.88 and 28,489.91

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Solution

The fourth proportional to 81,092.73, 121,625.88 and 28,489.91 is: 42,730.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,092.73 : 121,625.88 = 28,489.91 : x
  2. Step 2: Convert to fraction form
    81,092.73/121,625.88 = 28,489.91/x
  3. Step 3: Cross multiply
    81,092.73x = 121,625.88 × 28,489.91
  4. Step 4: Simplify right side
    81,092.73x = 3,465,109,766.74
  5. Step 5: Solve for x
    x = 3,465,109,766.74/81,092.73
  6. Step 6: Final answer
    x = 42,730.21

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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.