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Finding the Fourth Proportional to 118.72, 177.08 and 116.92

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Solution

The fourth proportional to 118.72, 177.08 and 116.92 is: 174.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.72 : 177.08 = 116.92 : x
  2. Step 2: Convert to fraction form
    118.72/177.08 = 116.92/x
  3. Step 3: Cross multiply
    118.72x = 177.08 × 116.92
  4. Step 4: Simplify right side
    118.72x = 20,704.19
  5. Step 5: Solve for x
    x = 20,704.19/118.72
  6. Step 6: Final answer
    x = 174.40

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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.