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Finding the Fourth Proportional to 122.24, 167.62 and 117.92

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Solution

The fourth proportional to 122.24, 167.62 and 117.92 is: 161.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.24 : 167.62 = 117.92 : x
  2. Step 2: Convert to fraction form
    122.24/167.62 = 117.92/x
  3. Step 3: Cross multiply
    122.24x = 167.62 × 117.92
  4. Step 4: Simplify right side
    122.24x = 19,765.75
  5. Step 5: Solve for x
    x = 19,765.75/122.24
  6. Step 6: Final answer
    x = 161.70

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.