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Finding the Third Proportional to 76,943.50 and 122,919

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Solution

The third proportional to 76,943.50 and 122,919 is: 196,365.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,943.50 : 122,919 = 122,919 : x
  2. Step 2: Convert to fraction form
    76,943.50/122,919 = 122,919/x
  3. Step 3: Cross multiply
    76,943.50x = 122,919 × 122,919
  4. Step 4: Simplify right side
    76,943.50x = 15,109,080,561
  5. Step 5: Solve for x
    x = 15,109,080,561/76,943.50
  6. Step 6: Final answer
    x = 196,365.91

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.