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Finding the Fourth Proportional to 68,760.78, 94,884.92 and 38,545.90

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Solution

The fourth proportional to 68,760.78, 94,884.92 and 38,545.90 is: 53,190.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,760.78 : 94,884.92 = 38,545.90 : x
  2. Step 2: Convert to fraction form
    68,760.78/94,884.92 = 38,545.90/x
  3. Step 3: Cross multiply
    68,760.78x = 94,884.92 × 38,545.90
  4. Step 4: Simplify right side
    68,760.78x = 3,657,424,637.83
  5. Step 5: Solve for x
    x = 3,657,424,637.83/68,760.78
  6. Step 6: Final answer
    x = 53,190.56

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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.