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Finding the Third Proportional to 51,990 and 80,649

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Solution

The third proportional to 51,990 and 80,649 is: 125,106.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,990 : 80,649 = 80,649 : x
  2. Step 2: Convert to fraction form
    51,990/80,649 = 80,649/x
  3. Step 3: Cross multiply
    51,990x = 80,649 × 80,649
  4. Step 4: Simplify right side
    51,990x = 6,504,261,201
  5. Step 5: Solve for x
    x = 6,504,261,201/51,990
  6. Step 6: Final answer
    x = 125,106.01

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.