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Finding the Third Proportional to 71,300 and 81,668

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Solution

The third proportional to 71,300 and 81,668 is: 93,543.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,300 : 81,668 = 81,668 : x
  2. Step 2: Convert to fraction form
    71,300/81,668 = 81,668/x
  3. Step 3: Cross multiply
    71,300x = 81,668 × 81,668
  4. Step 4: Simplify right side
    71,300x = 6,669,662,224
  5. Step 5: Solve for x
    x = 6,669,662,224/71,300
  6. Step 6: Final answer
    x = 93,543.65

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.