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Finding the Fourth Proportional to 128,249.91, 192,378.15 and 60,766.11

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Solution

The fourth proportional to 128,249.91, 192,378.15 and 60,766.11 is: 91,150.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,249.91 : 192,378.15 = 60,766.11 : x
  2. Step 2: Convert to fraction form
    128,249.91/192,378.15 = 60,766.11/x
  3. Step 3: Cross multiply
    128,249.91x = 192,378.15 × 60,766.11
  4. Step 4: Simplify right side
    128,249.91x = 11,690,071,824.50
  5. Step 5: Solve for x
    x = 11,690,071,824.50/128,249.91
  6. Step 6: Final answer
    x = 91,150.72

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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.