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Finding the Fourth Proportional to 128,593.89, 192,883.41 and 38,634.66

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Solution

The fourth proportional to 128,593.89, 192,883.41 and 38,634.66 is: 57,949.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,593.89 : 192,883.41 = 38,634.66 : x
  2. Step 2: Convert to fraction form
    128,593.89/192,883.41 = 38,634.66/x
  3. Step 3: Cross multiply
    128,593.89x = 192,883.41 × 38,634.66
  4. Step 4: Simplify right side
    128,593.89x = 7,451,984,964.99
  5. Step 5: Solve for x
    x = 7,451,984,964.99/128,593.89
  6. Step 6: Final answer
    x = 57,949.76

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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.