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Finding the Third Proportional to 18,721.03 and 40,872.56

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Solution

The third proportional to 18,721.03 and 40,872.56 is: 89,234.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.03 : 40,872.56 = 40,872.56 : x
  2. Step 2: Convert to fraction form
    18,721.03/40,872.56 = 40,872.56/x
  3. Step 3: Cross multiply
    18,721.03x = 40,872.56 × 40,872.56
  4. Step 4: Simplify right side
    18,721.03x = 1,670,566,365.32
  5. Step 5: Solve for x
    x = 1,670,566,365.32/18,721.03
  6. Step 6: Final answer
    x = 89,234.74

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.