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Finding the Fourth Proportional to 118.34, 177.31 and 84.16

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Solution

The fourth proportional to 118.34, 177.31 and 84.16 is: 126.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.34 : 177.31 = 84.16 : x
  2. Step 2: Convert to fraction form
    118.34/177.31 = 84.16/x
  3. Step 3: Cross multiply
    118.34x = 177.31 × 84.16
  4. Step 4: Simplify right side
    118.34x = 14,923.47
  5. Step 5: Solve for x
    x = 14,923.47/118.34
  6. Step 6: Final answer
    x = 126.11

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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.