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Finding the Third Proportional to 121,791 and 191,305

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Solution

The third proportional to 121,791 and 191,305 is: 300,495.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,791 : 191,305 = 191,305 : x
  2. Step 2: Convert to fraction form
    121,791/191,305 = 191,305/x
  3. Step 3: Cross multiply
    121,791x = 191,305 × 191,305
  4. Step 4: Simplify right side
    121,791x = 36,597,603,025
  5. Step 5: Solve for x
    x = 36,597,603,025/121,791
  6. Step 6: Final answer
    x = 300,495.14

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.