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Finding the Fourth Proportional to 92,487.20, 138,730.80 and 82,645.70

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Solution

The fourth proportional to 92,487.20, 138,730.80 and 82,645.70 is: 123,968.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,487.20 : 138,730.80 = 82,645.70 : x
  2. Step 2: Convert to fraction form
    92,487.20/138,730.80 = 82,645.70/x
  3. Step 3: Cross multiply
    92,487.20x = 138,730.80 × 82,645.70
  4. Step 4: Simplify right side
    92,487.20x = 11,465,504,077.56
  5. Step 5: Solve for x
    x = 11,465,504,077.56/92,487.20
  6. Step 6: Final answer
    x = 123,968.55

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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.