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Finding the Fourth Proportional to 68,978.61, 95,189.99 and 38,763.28

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Solution

The fourth proportional to 68,978.61, 95,189.99 and 38,763.28 is: 53,493.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,978.61 : 95,189.99 = 38,763.28 : x
  2. Step 2: Convert to fraction form
    68,978.61/95,189.99 = 38,763.28/x
  3. Step 3: Cross multiply
    68,978.61x = 95,189.99 × 38,763.28
  4. Step 4: Simplify right side
    68,978.61x = 3,689,876,755.53
  5. Step 5: Solve for x
    x = 3,689,876,755.53/68,978.61
  6. Step 6: Final answer
    x = 53,493.06

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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.