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Finding the Fourth Proportional to 171.76, 235.49 and 168.69

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Solution

The fourth proportional to 171.76, 235.49 and 168.69 is: 231.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.76 : 235.49 = 168.69 : x
  2. Step 2: Convert to fraction form
    171.76/235.49 = 168.69/x
  3. Step 3: Cross multiply
    171.76x = 235.49 × 168.69
  4. Step 4: Simplify right side
    171.76x = 39,723.96
  5. Step 5: Solve for x
    x = 39,723.96/171.76
  6. Step 6: Final answer
    x = 231.28

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.