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Finding the Fourth Proportional to 128,179.82, 192,270.21 and 39,432.71

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Solution

The fourth proportional to 128,179.82, 192,270.21 and 39,432.71 is: 59,149.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,179.82 : 192,270.21 = 39,432.71 : x
  2. Step 2: Convert to fraction form
    128,179.82/192,270.21 = 39,432.71/x
  3. Step 3: Cross multiply
    128,179.82x = 192,270.21 × 39,432.71
  4. Step 4: Simplify right side
    128,179.82x = 7,581,735,765.37
  5. Step 5: Solve for x
    x = 7,581,735,765.37/128,179.82
  6. Step 6: Final answer
    x = 59,149.21

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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.