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Finding the Fourth Proportional to 92,562.70, 138,844.05 and 82,721.20

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Solution

The fourth proportional to 92,562.70, 138,844.05 and 82,721.20 is: 124,081.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,562.70 : 138,844.05 = 82,721.20 : x
  2. Step 2: Convert to fraction form
    92,562.70/138,844.05 = 82,721.20/x
  3. Step 3: Cross multiply
    92,562.70x = 138,844.05 × 82,721.20
  4. Step 4: Simplify right side
    92,562.70x = 11,485,346,428.86
  5. Step 5: Solve for x
    x = 11,485,346,428.86/92,562.70
  6. Step 6: Final answer
    x = 124,081.80

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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.