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Finding the Fourth Proportional to 118.98, 178.38 and 101.79

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Solution

The fourth proportional to 118.98, 178.38 and 101.79 is: 152.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.98 : 178.38 = 101.79 : x
  2. Step 2: Convert to fraction form
    118.98/178.38 = 101.79/x
  3. Step 3: Cross multiply
    118.98x = 178.38 × 101.79
  4. Step 4: Simplify right side
    118.98x = 18,157.30
  5. Step 5: Solve for x
    x = 18,157.30/118.98
  6. Step 6: Final answer
    x = 152.61

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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.