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Finding the Fourth Proportional to 68,978.57, 95,192.66 and 38,769.71

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Solution

The fourth proportional to 68,978.57, 95,192.66 and 38,769.71 is: 53,503.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,978.57 : 95,192.66 = 38,769.71 : x
  2. Step 2: Convert to fraction form
    68,978.57/95,192.66 = 38,769.71/x
  3. Step 3: Cross multiply
    68,978.57x = 95,192.66 × 38,769.71
  4. Step 4: Simplify right side
    68,978.57x = 3,690,591,443.29
  5. Step 5: Solve for x
    x = 3,690,591,443.29/68,978.57
  6. Step 6: Final answer
    x = 53,503.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.