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Finding the Fourth Proportional to 171.15, 256.47 and 97.92

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Solution

The fourth proportional to 171.15, 256.47 and 97.92 is: 146.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.15 : 256.47 = 97.92 : x
  2. Step 2: Convert to fraction form
    171.15/256.47 = 97.92/x
  3. Step 3: Cross multiply
    171.15x = 256.47 × 97.92
  4. Step 4: Simplify right side
    171.15x = 25,113.54
  5. Step 5: Solve for x
    x = 25,113.54/171.15
  6. Step 6: Final answer
    x = 146.73

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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.