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Finding the Third Proportional to 57,979 and 82,689

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Solution

The third proportional to 57,979 and 82,689 is: 117,930.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,979 : 82,689 = 82,689 : x
  2. Step 2: Convert to fraction form
    57,979/82,689 = 82,689/x
  3. Step 3: Cross multiply
    57,979x = 82,689 × 82,689
  4. Step 4: Simplify right side
    57,979x = 6,837,470,721
  5. Step 5: Solve for x
    x = 6,837,470,721/57,979
  6. Step 6: Final answer
    x = 117,930.13

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.