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Finding the Third Proportional to 83.06 and 85.69

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Solution

The third proportional to 83.06 and 85.69 is: 88.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.06 : 85.69 = 85.69 : x
  2. Step 2: Convert to fraction form
    83.06/85.69 = 85.69/x
  3. Step 3: Cross multiply
    83.06x = 85.69 × 85.69
  4. Step 4: Simplify right side
    83.06x = 7,342.35
  5. Step 5: Solve for x
    x = 7,342.35/83.06
  6. Step 6: Final answer
    x = 88.40

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Why These Related Problems?

These problems maintain the same ratio (1.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.