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Finding the Third Proportional to 51,922 and 78,231

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Solution

The third proportional to 51,922 and 78,231 is: 117,870.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,922 : 78,231 = 78,231 : x
  2. Step 2: Convert to fraction form
    51,922/78,231 = 78,231/x
  3. Step 3: Cross multiply
    51,922x = 78,231 × 78,231
  4. Step 4: Simplify right side
    51,922x = 6,120,089,361
  5. Step 5: Solve for x
    x = 6,120,089,361/51,922
  6. Step 6: Final answer
    x = 117,870.83

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.