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Finding the Third Proportional to 77,680 and 169,891

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Solution

The third proportional to 77,680 and 169,891 is: 371,562.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,680 : 169,891 = 169,891 : x
  2. Step 2: Convert to fraction form
    77,680/169,891 = 169,891/x
  3. Step 3: Cross multiply
    77,680x = 169,891 × 169,891
  4. Step 4: Simplify right side
    77,680x = 28,862,951,881
  5. Step 5: Solve for x
    x = 28,862,951,881/77,680
  6. Step 6: Final answer
    x = 371,562.20

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.