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Finding the Fourth Proportional to 171,331.78, 256,859.11 and 71,568.38

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Solution

The fourth proportional to 171,331.78, 256,859.11 and 71,568.38 is: 107,294.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,331.78 : 256,859.11 = 71,568.38 : x
  2. Step 2: Convert to fraction form
    171,331.78/256,859.11 = 71,568.38/x
  3. Step 3: Cross multiply
    171,331.78x = 256,859.11 × 71,568.38
  4. Step 4: Simplify right side
    171,331.78x = 18,382,990,390.94
  5. Step 5: Solve for x
    x = 18,382,990,390.94/171,331.78
  6. Step 6: Final answer
    x = 107,294.69

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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.