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Finding the Fourth Proportional to 171.91, 235.41 and 162.55

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Solution

The fourth proportional to 171.91, 235.41 and 162.55 is: 222.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.91 : 235.41 = 162.55 : x
  2. Step 2: Convert to fraction form
    171.91/235.41 = 162.55/x
  3. Step 3: Cross multiply
    171.91x = 235.41 × 162.55
  4. Step 4: Simplify right side
    171.91x = 38,265.90
  5. Step 5: Solve for x
    x = 38,265.90/171.91
  6. Step 6: Final answer
    x = 222.59

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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.