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Finding the Fourth Proportional to 171.61, 236.81 and 97.92

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Solution

The fourth proportional to 171.61, 236.81 and 97.92 is: 135.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.61 : 236.81 = 97.92 : x
  2. Step 2: Convert to fraction form
    171.61/236.81 = 97.92/x
  3. Step 3: Cross multiply
    171.61x = 236.81 × 97.92
  4. Step 4: Simplify right side
    171.61x = 23,188.44
  5. Step 5: Solve for x
    x = 23,188.44/171.61
  6. Step 6: Final answer
    x = 135.12

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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.