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Finding the Fourth Proportional to 98.01, 146.70 and 80.87

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Solution

The fourth proportional to 98.01, 146.70 and 80.87 is: 121.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.01 : 146.70 = 80.87 : x
  2. Step 2: Convert to fraction form
    98.01/146.70 = 80.87/x
  3. Step 3: Cross multiply
    98.01x = 146.70 × 80.87
  4. Step 4: Simplify right side
    98.01x = 11,862.90
  5. Step 5: Solve for x
    x = 11,862.90/98.01
  6. Step 6: Final answer
    x = 121.04

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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.