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Finding the Fourth Proportional to 128,249.90, 192,378.16 and 60,766.10

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Solution

The fourth proportional to 128,249.90, 192,378.16 and 60,766.10 is: 91,150.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,249.90 : 192,378.16 = 60,766.10 : x
  2. Step 2: Convert to fraction form
    128,249.90/192,378.16 = 60,766.10/x
  3. Step 3: Cross multiply
    128,249.90x = 192,378.16 × 60,766.10
  4. Step 4: Simplify right side
    128,249.90x = 11,690,070,508.38
  5. Step 5: Solve for x
    x = 11,690,070,508.38/128,249.90
  6. Step 6: Final answer
    x = 91,150.72

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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.