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Finding the Fourth Proportional to 91,843.80, 137,765.70 and 80,179.80

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Solution

The fourth proportional to 91,843.80, 137,765.70 and 80,179.80 is: 120,269.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,843.80 : 137,765.70 = 80,179.80 : x
  2. Step 2: Convert to fraction form
    91,843.80/137,765.70 = 80,179.80/x
  3. Step 3: Cross multiply
    91,843.80x = 137,765.70 × 80,179.80
  4. Step 4: Simplify right side
    91,843.80x = 11,046,026,272.86
  5. Step 5: Solve for x
    x = 11,046,026,272.86/91,843.80
  6. Step 6: Final answer
    x = 120,269.70

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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.