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Finding the Fourth Proportional to 118.11, 176.31 and 108.48

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Solution

The fourth proportional to 118.11, 176.31 and 108.48 is: 161.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.11 : 176.31 = 108.48 : x
  2. Step 2: Convert to fraction form
    118.11/176.31 = 108.48/x
  3. Step 3: Cross multiply
    118.11x = 176.31 × 108.48
  4. Step 4: Simplify right side
    118.11x = 19,126.11
  5. Step 5: Solve for x
    x = 19,126.11/118.11
  6. Step 6: Final answer
    x = 161.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.