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Finding the Fourth Proportional to 118.20, 176.55 and 97.86

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Solution

The fourth proportional to 118.20, 176.55 and 97.86 is: 146.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.20 : 176.55 = 97.86 : x
  2. Step 2: Convert to fraction form
    118.20/176.55 = 97.86/x
  3. Step 3: Cross multiply
    118.20x = 176.55 × 97.86
  4. Step 4: Simplify right side
    118.20x = 17,277.18
  5. Step 5: Solve for x
    x = 17,277.18/118.20
  6. Step 6: Final answer
    x = 146.17

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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.