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Finding the Fourth Proportional to 91,921.80, 137,882.70 and 73,489.80

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Solution

The fourth proportional to 91,921.80, 137,882.70 and 73,489.80 is: 110,234.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,921.80 : 137,882.70 = 73,489.80 : x
  2. Step 2: Convert to fraction form
    91,921.80/137,882.70 = 73,489.80/x
  3. Step 3: Cross multiply
    91,921.80x = 137,882.70 × 73,489.80
  4. Step 4: Simplify right side
    91,921.80x = 10,132,972,046.46
  5. Step 5: Solve for x
    x = 10,132,972,046.46/91,921.80
  6. Step 6: Final answer
    x = 110,234.70

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1.5x scale

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.