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Finding the Fourth Proportional to 171.10, 235.92 and 108.85

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Solution

The fourth proportional to 171.10, 235.92 and 108.85 is: 150.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.10 : 235.92 = 108.85 : x
  2. Step 2: Convert to fraction form
    171.10/235.92 = 108.85/x
  3. Step 3: Cross multiply
    171.10x = 235.92 × 108.85
  4. Step 4: Simplify right side
    171.10x = 25,679.89
  5. Step 5: Solve for x
    x = 25,679.89/171.10
  6. Step 6: Final answer
    x = 150.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.