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Finding the Third Proportional to 109,500.75 and 121,020.75

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Solution

The third proportional to 109,500.75 and 121,020.75 is: 133,752.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,500.75 : 121,020.75 = 121,020.75 : x
  2. Step 2: Convert to fraction form
    109,500.75/121,020.75 = 121,020.75/x
  3. Step 3: Cross multiply
    109,500.75x = 121,020.75 × 121,020.75
  4. Step 4: Simplify right side
    109,500.75x = 14,646,021,930.56
  5. Step 5: Solve for x
    x = 14,646,021,930.56/109,500.75
  6. Step 6: Final answer
    x = 133,752.71

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.