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Finding the Third Proportional to 51,855 and 80,211

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Solution

The third proportional to 51,855 and 80,211 is: 124,072.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,855 : 80,211 = 80,211 : x
  2. Step 2: Convert to fraction form
    51,855/80,211 = 80,211/x
  3. Step 3: Cross multiply
    51,855x = 80,211 × 80,211
  4. Step 4: Simplify right side
    51,855x = 6,433,804,521
  5. Step 5: Solve for x
    x = 6,433,804,521/51,855
  6. Step 6: Final answer
    x = 124,072.98

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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.