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Finding the Fourth Proportional to 92,437.20, 138,655.80 and 80,773.20

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Solution

The fourth proportional to 92,437.20, 138,655.80 and 80,773.20 is: 121,159.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,437.20 : 138,655.80 = 80,773.20 : x
  2. Step 2: Convert to fraction form
    92,437.20/138,655.80 = 80,773.20/x
  3. Step 3: Cross multiply
    92,437.20x = 138,655.80 × 80,773.20
  4. Step 4: Simplify right side
    92,437.20x = 11,199,672,664.56
  5. Step 5: Solve for x
    x = 11,199,672,664.56/92,437.20
  6. Step 6: Final answer
    x = 121,159.80

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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.