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Finding the Fourth Proportional to 118.38, 177.21 and 104.94

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Solution

The fourth proportional to 118.38, 177.21 and 104.94 is: 157.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.38 : 177.21 = 104.94 : x
  2. Step 2: Convert to fraction form
    118.38/177.21 = 104.94/x
  3. Step 3: Cross multiply
    118.38x = 177.21 × 104.94
  4. Step 4: Simplify right side
    118.38x = 18,596.42
  5. Step 5: Solve for x
    x = 18,596.42/118.38
  6. Step 6: Final answer
    x = 157.09

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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.