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Finding the Fourth Proportional to 171.46, 236.40 and 122.26

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Solution

The fourth proportional to 171.46, 236.40 and 122.26 is: 168.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.46 : 236.40 = 122.26 : x
  2. Step 2: Convert to fraction form
    171.46/236.40 = 122.26/x
  3. Step 3: Cross multiply
    171.46x = 236.40 × 122.26
  4. Step 4: Simplify right side
    171.46x = 28,902.26
  5. Step 5: Solve for x
    x = 28,902.26/171.46
  6. Step 6: Final answer
    x = 168.57

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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.