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Finding the Third Proportional to 34,940 and 77,620

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Solution

The third proportional to 34,940 and 77,620 is: 172,434.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,940 : 77,620 = 77,620 : x
  2. Step 2: Convert to fraction form
    34,940/77,620 = 77,620/x
  3. Step 3: Cross multiply
    34,940x = 77,620 × 77,620
  4. Step 4: Simplify right side
    34,940x = 6,024,864,400
  5. Step 5: Solve for x
    x = 6,024,864,400/34,940
  6. Step 6: Final answer
    x = 172,434.59

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.