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Finding the Fourth Proportional to 122.42, 182.35 and 119.79

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Solution

The fourth proportional to 122.42, 182.35 and 119.79 is: 178.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.42 : 182.35 = 119.79 : x
  2. Step 2: Convert to fraction form
    122.42/182.35 = 119.79/x
  3. Step 3: Cross multiply
    122.42x = 182.35 × 119.79
  4. Step 4: Simplify right side
    122.42x = 21,843.18
  5. Step 5: Solve for x
    x = 21,843.18/122.42
  6. Step 6: Final answer
    x = 178.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.