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Finding the Third Proportional to 54,154.50 and 80,781

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Solution

The third proportional to 54,154.50 and 80,781 is: 120,499.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,154.50 : 80,781 = 80,781 : x
  2. Step 2: Convert to fraction form
    54,154.50/80,781 = 80,781/x
  3. Step 3: Cross multiply
    54,154.50x = 80,781 × 80,781
  4. Step 4: Simplify right side
    54,154.50x = 6,525,569,961
  5. Step 5: Solve for x
    x = 6,525,569,961/54,154.50
  6. Step 6: Final answer
    x = 120,499.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.