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Finding the Fourth Proportional to 68,728.91, 103,109.76 and 24,359.54

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Solution

The fourth proportional to 68,728.91, 103,109.76 and 24,359.54 is: 36,545.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,728.91 : 103,109.76 = 24,359.54 : x
  2. Step 2: Convert to fraction form
    68,728.91/103,109.76 = 24,359.54/x
  3. Step 3: Cross multiply
    68,728.91x = 103,109.76 × 24,359.54
  4. Step 4: Simplify right side
    68,728.91x = 2,511,705,807.56
  5. Step 5: Solve for x
    x = 2,511,705,807.56/68,728.91
  6. Step 6: Final answer
    x = 36,545.12

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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.