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Finding the Fourth Proportional to 118.71, 177.08 and 116.55

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Solution

The fourth proportional to 118.71, 177.08 and 116.55 is: 173.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.71 : 177.08 = 116.55 : x
  2. Step 2: Convert to fraction form
    118.71/177.08 = 116.55/x
  3. Step 3: Cross multiply
    118.71x = 177.08 × 116.55
  4. Step 4: Simplify right side
    118.71x = 20,638.09
  5. Step 5: Solve for x
    x = 20,638.09/118.71
  6. Step 6: Final answer
    x = 173.85

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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.