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Finding the Fourth Proportional to 171.14, 236.37 and 122.18

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Solution

The fourth proportional to 171.14, 236.37 and 122.18 is: 168.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.14 : 236.37 = 122.18 : x
  2. Step 2: Convert to fraction form
    171.14/236.37 = 122.18/x
  3. Step 3: Cross multiply
    171.14x = 236.37 × 122.18
  4. Step 4: Simplify right side
    171.14x = 28,879.69
  5. Step 5: Solve for x
    x = 28,879.69/171.14
  6. Step 6: Final answer
    x = 168.75

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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.