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Finding the Fourth Proportional to 118.39, 177.26 and 111.56

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Solution

The fourth proportional to 118.39, 177.26 and 111.56 is: 167.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.39 : 177.26 = 111.56 : x
  2. Step 2: Convert to fraction form
    118.39/177.26 = 111.56/x
  3. Step 3: Cross multiply
    118.39x = 177.26 × 111.56
  4. Step 4: Simplify right side
    118.39x = 19,774.57
  5. Step 5: Solve for x
    x = 19,774.57/118.39
  6. Step 6: Final answer
    x = 167.04

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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.