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Finding the Third Proportional to 45,721 and 68,581

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Solution

The third proportional to 45,721 and 68,581 is: 102,870.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,721 : 68,581 = 68,581 : x
  2. Step 2: Convert to fraction form
    45,721/68,581 = 68,581/x
  3. Step 3: Cross multiply
    45,721x = 68,581 × 68,581
  4. Step 4: Simplify right side
    45,721x = 4,703,353,561
  5. Step 5: Solve for x
    x = 4,703,353,561/45,721
  6. Step 6: Final answer
    x = 102,870.75

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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.