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Finding the Third Proportional to 67.50 and 98.13

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Solution

The third proportional to 67.50 and 98.13 is: 142.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.50 : 98.13 = 98.13 : x
  2. Step 2: Convert to fraction form
    67.50/98.13 = 98.13/x
  3. Step 3: Cross multiply
    67.50x = 98.13 × 98.13
  4. Step 4: Simplify right side
    67.50x = 9,628.52
  5. Step 5: Solve for x
    x = 9,628.52/67.50
  6. Step 6: Final answer
    x = 142.64

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.