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Finding the Fourth Proportional to 247,229.65, 370,721.79 and 78,728.02

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Solution

The fourth proportional to 247,229.65, 370,721.79 and 78,728.02 is: 118,052.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,229.65 : 370,721.79 = 78,728.02 : x
  2. Step 2: Convert to fraction form
    247,229.65/370,721.79 = 78,728.02/x
  3. Step 3: Cross multiply
    247,229.65x = 370,721.79 × 78,728.02
  4. Step 4: Simplify right side
    247,229.65x = 29,186,192,497.56
  5. Step 5: Solve for x
    x = 29,186,192,497.56/247,229.65
  6. Step 6: Final answer
    x = 118,052.96

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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.