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Finding the Fourth Proportional to 192,691.20, 289,022.40 and 80,342.40

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Solution

The fourth proportional to 192,691.20, 289,022.40 and 80,342.40 is: 120,507.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,691.20 : 289,022.40 = 80,342.40 : x
  2. Step 2: Convert to fraction form
    192,691.20/289,022.40 = 80,342.40/x
  3. Step 3: Cross multiply
    192,691.20x = 289,022.40 × 80,342.40
  4. Step 4: Simplify right side
    192,691.20x = 23,220,753,269.76
  5. Step 5: Solve for x
    x = 23,220,753,269.76/192,691.20
  6. Step 6: Final answer
    x = 120,507.60

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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.