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Finding the Fourth Proportional to 118.06, 176.78 and 98.82

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Solution

The fourth proportional to 118.06, 176.78 and 98.82 is: 147.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.06 : 176.78 = 98.82 : x
  2. Step 2: Convert to fraction form
    118.06/176.78 = 98.82/x
  3. Step 3: Cross multiply
    118.06x = 176.78 × 98.82
  4. Step 4: Simplify right side
    118.06x = 17,469.65
  5. Step 5: Solve for x
    x = 17,469.65/118.06
  6. Step 6: Final answer
    x = 147.98

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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.