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Finding the Third Proportional to 79,520 and 121,829

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Solution

The third proportional to 79,520 and 121,829 is: 186,648.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,520 : 121,829 = 121,829 : x
  2. Step 2: Convert to fraction form
    79,520/121,829 = 121,829/x
  3. Step 3: Cross multiply
    79,520x = 121,829 × 121,829
  4. Step 4: Simplify right side
    79,520x = 14,842,305,241
  5. Step 5: Solve for x
    x = 14,842,305,241/79,520
  6. Step 6: Final answer
    x = 186,648.71

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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.