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Finding the Fourth Proportional to 136.80, 204.75 and 98.13

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Solution

The fourth proportional to 136.80, 204.75 and 98.13 is: 146.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.80 : 204.75 = 98.13 : x
  2. Step 2: Convert to fraction form
    136.80/204.75 = 98.13/x
  3. Step 3: Cross multiply
    136.80x = 204.75 × 98.13
  4. Step 4: Simplify right side
    136.80x = 20,092.12
  5. Step 5: Solve for x
    x = 20,092.12/136.80
  6. Step 6: Final answer
    x = 146.87

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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.