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Finding the Fourth Proportional to 122.52, 168.09 and 119.46

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Solution

The fourth proportional to 122.52, 168.09 and 119.46 is: 163.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.52 : 168.09 = 119.46 : x
  2. Step 2: Convert to fraction form
    122.52/168.09 = 119.46/x
  3. Step 3: Cross multiply
    122.52x = 168.09 × 119.46
  4. Step 4: Simplify right side
    122.52x = 20,080.03
  5. Step 5: Solve for x
    x = 20,080.03/122.52
  6. Step 6: Final answer
    x = 163.89

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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.