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Finding the Fourth Proportional to 122.22, 167.87 and 119.91

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Solution

The fourth proportional to 122.22, 167.87 and 119.91 is: 164.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.22 : 167.87 = 119.91 : x
  2. Step 2: Convert to fraction form
    122.22/167.87 = 119.91/x
  3. Step 3: Cross multiply
    122.22x = 167.87 × 119.91
  4. Step 4: Simplify right side
    122.22x = 20,129.29
  5. Step 5: Solve for x
    x = 20,129.29/122.22
  6. Step 6: Final answer
    x = 164.70

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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.