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Finding the Fourth Proportional to 91,796.20, 137,694.30 and 81,773.80

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Solution

The fourth proportional to 91,796.20, 137,694.30 and 81,773.80 is: 122,660.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,796.20 : 137,694.30 = 81,773.80 : x
  2. Step 2: Convert to fraction form
    91,796.20/137,694.30 = 81,773.80/x
  3. Step 3: Cross multiply
    91,796.20x = 137,694.30 × 81,773.80
  4. Step 4: Simplify right side
    91,796.20x = 11,259,786,149.34
  5. Step 5: Solve for x
    x = 11,259,786,149.34/91,796.20
  6. Step 6: Final answer
    x = 122,660.70

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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.