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Finding the Fourth Proportional to 171,329.28, 256,855.36 and 71,565.88

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Solution

The fourth proportional to 171,329.28, 256,855.36 and 71,565.88 is: 107,290.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,329.28 : 256,855.36 = 71,565.88 : x
  2. Step 2: Convert to fraction form
    171,329.28/256,855.36 = 71,565.88/x
  3. Step 3: Cross multiply
    171,329.28x = 256,855.36 × 71,565.88
  4. Step 4: Simplify right side
    171,329.28x = 18,382,079,871.12
  5. Step 5: Solve for x
    x = 18,382,079,871.12/171,329.28
  6. Step 6: Final answer
    x = 107,290.94

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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.