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Finding the Third Proportional to 70.50 and 83.25

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Solution

The third proportional to 70.50 and 83.25 is: 98.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.50 : 83.25 = 83.25 : x
  2. Step 2: Convert to fraction form
    70.50/83.25 = 83.25/x
  3. Step 3: Cross multiply
    70.50x = 83.25 × 83.25
  4. Step 4: Simplify right side
    70.50x = 6,930.56
  5. Step 5: Solve for x
    x = 6,930.56/70.50
  6. Step 6: Final answer
    x = 98.31

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.