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Finding the Fourth Proportional to 169.79, 254.60 and 118.76

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Solution

The fourth proportional to 169.79, 254.60 and 118.76 is: 178.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.79 : 254.60 = 118.76 : x
  2. Step 2: Convert to fraction form
    169.79/254.60 = 118.76/x
  3. Step 3: Cross multiply
    169.79x = 254.60 × 118.76
  4. Step 4: Simplify right side
    169.79x = 30,236.30
  5. Step 5: Solve for x
    x = 30,236.30/169.79
  6. Step 6: Final answer
    x = 178.08

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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.