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Finding the Third Proportional to 51,876 and 79,320

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Solution

The third proportional to 51,876 and 79,320 is: 121,282.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,876 : 79,320 = 79,320 : x
  2. Step 2: Convert to fraction form
    51,876/79,320 = 79,320/x
  3. Step 3: Cross multiply
    51,876x = 79,320 × 79,320
  4. Step 4: Simplify right side
    51,876x = 6,291,662,400
  5. Step 5: Solve for x
    x = 6,291,662,400/51,876
  6. Step 6: Final answer
    x = 121,282.72

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.