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Finding the Fourth Proportional to 171.14, 236.21 and 108.90

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Solution

The fourth proportional to 171.14, 236.21 and 108.90 is: 150.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.14 : 236.21 = 108.90 : x
  2. Step 2: Convert to fraction form
    171.14/236.21 = 108.90/x
  3. Step 3: Cross multiply
    171.14x = 236.21 × 108.90
  4. Step 4: Simplify right side
    171.14x = 25,722.72
  5. Step 5: Solve for x
    x = 25,722.72/171.14
  6. Step 6: Final answer
    x = 150.31

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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.