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Finding the Fourth Proportional to 91,454.60, 137,122.70 and 38,849.80

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Solution

The fourth proportional to 91,454.60, 137,122.70 and 38,849.80 is: 58,249.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,454.60 : 137,122.70 = 38,849.80 : x
  2. Step 2: Convert to fraction form
    91,454.60/137,122.70 = 38,849.80/x
  3. Step 3: Cross multiply
    91,454.60x = 137,122.70 × 38,849.80
  4. Step 4: Simplify right side
    91,454.60x = 5,327,189,470.46
  5. Step 5: Solve for x
    x = 5,327,189,470.46/91,454.60
  6. Step 6: Final answer
    x = 58,249.55

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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.