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Finding the Third Proportional to 81,620 and 170,622

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Solution

The third proportional to 81,620 and 170,622 is: 356,675.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,620 : 170,622 = 170,622 : x
  2. Step 2: Convert to fraction form
    81,620/170,622 = 170,622/x
  3. Step 3: Cross multiply
    81,620x = 170,622 × 170,622
  4. Step 4: Simplify right side
    81,620x = 29,111,866,884
  5. Step 5: Solve for x
    x = 29,111,866,884/81,620
  6. Step 6: Final answer
    x = 356,675.65

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.