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Finding the Fourth Proportional to 171,191.92, 256,648.76 and 71,426.44

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Solution

The fourth proportional to 171,191.92, 256,648.76 and 71,426.44 is: 107,081.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,191.92 : 256,648.76 = 71,426.44 : x
  2. Step 2: Convert to fraction form
    171,191.92/256,648.76 = 71,426.44/x
  3. Step 3: Cross multiply
    171,191.92x = 256,648.76 × 71,426.44
  4. Step 4: Simplify right side
    171,191.92x = 18,331,507,257.21
  5. Step 5: Solve for x
    x = 18,331,507,257.21/171,191.92
  6. Step 6: Final answer
    x = 107,081.61

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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.