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Finding the Fourth Proportional to 57,092.60, 78,787.90 and 31,600.70

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Solution

The fourth proportional to 57,092.60, 78,787.90 and 31,600.70 is: 43,609.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,092.60 : 78,787.90 = 31,600.70 : x
  2. Step 2: Convert to fraction form
    57,092.60/78,787.90 = 31,600.70/x
  3. Step 3: Cross multiply
    57,092.60x = 78,787.90 × 31,600.70
  4. Step 4: Simplify right side
    57,092.60x = 2,489,752,791.53
  5. Step 5: Solve for x
    x = 2,489,752,791.53/57,092.60
  6. Step 6: Final answer
    x = 43,609.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.