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Finding the Fourth Proportional to 128,249.71, 192,377.87 and 60,765.91

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Solution

The fourth proportional to 128,249.71, 192,377.87 and 60,765.91 is: 91,150.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,249.71 : 192,377.87 = 60,765.91 : x
  2. Step 2: Convert to fraction form
    128,249.71/192,377.87 = 60,765.91/x
  3. Step 3: Cross multiply
    128,249.71x = 192,377.87 × 60,765.91
  4. Step 4: Simplify right side
    128,249.71x = 11,690,015,777.51
  5. Step 5: Solve for x
    x = 11,690,015,777.51/128,249.71
  6. Step 6: Final answer
    x = 91,150.43

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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.