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Finding the Fourth Proportional to 179.14, 268.82 and 121.42

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Solution

The fourth proportional to 179.14, 268.82 and 121.42 is: 182.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.14 : 268.82 = 121.42 : x
  2. Step 2: Convert to fraction form
    179.14/268.82 = 121.42/x
  3. Step 3: Cross multiply
    179.14x = 268.82 × 121.42
  4. Step 4: Simplify right side
    179.14x = 32,641.06
  5. Step 5: Solve for x
    x = 32,641.06/179.14
  6. Step 6: Final answer
    x = 182.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.