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Finding the Fourth Proportional to 171.05, 236.18 and 115.76

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Solution

The fourth proportional to 171.05, 236.18 and 115.76 is: 159.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.05 : 236.18 = 115.76 : x
  2. Step 2: Convert to fraction form
    171.05/236.18 = 115.76/x
  3. Step 3: Cross multiply
    171.05x = 236.18 × 115.76
  4. Step 4: Simplify right side
    171.05x = 27,341.08
  5. Step 5: Solve for x
    x = 27,341.08/171.05
  6. Step 6: Final answer
    x = 159.85

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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.