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Finding the Fourth Proportional to 92,214.60, 138,321.90 and 60,721.80

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Solution

The fourth proportional to 92,214.60, 138,321.90 and 60,721.80 is: 91,082.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,214.60 : 138,321.90 = 60,721.80 : x
  2. Step 2: Convert to fraction form
    92,214.60/138,321.90 = 60,721.80/x
  3. Step 3: Cross multiply
    92,214.60x = 138,321.90 × 60,721.80
  4. Step 4: Simplify right side
    92,214.60x = 8,399,154,747.42
  5. Step 5: Solve for x
    x = 8,399,154,747.42/92,214.60
  6. Step 6: Final answer
    x = 91,082.70

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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.