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Finding the Fourth Proportional to 68,940.56, 95,137.92 and 39,132.56

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Solution

The fourth proportional to 68,940.56, 95,137.92 and 39,132.56 is: 54,002.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,940.56 : 95,137.92 = 39,132.56 : x
  2. Step 2: Convert to fraction form
    68,940.56/95,137.92 = 39,132.56/x
  3. Step 3: Cross multiply
    68,940.56x = 95,137.92 × 39,132.56
  4. Step 4: Simplify right side
    68,940.56x = 3,722,990,362.68
  5. Step 5: Solve for x
    x = 3,722,990,362.68/68,940.56
  6. Step 6: Final answer
    x = 54,002.90

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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.