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Finding the Fourth Proportional to 171.16, 236.27 and 115.16

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Solution

The fourth proportional to 171.16, 236.27 and 115.16 is: 158.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.16 : 236.27 = 115.16 : x
  2. Step 2: Convert to fraction form
    171.16/236.27 = 115.16/x
  3. Step 3: Cross multiply
    171.16x = 236.27 × 115.16
  4. Step 4: Simplify right side
    171.16x = 27,207.96
  5. Step 5: Solve for x
    x = 27,207.96/171.16
  6. Step 6: Final answer
    x = 158.96

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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.