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Finding the Third Proportional to 77,105 and 120,982

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Solution

The third proportional to 77,105 and 120,982 is: 189,827.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,105 : 120,982 = 120,982 : x
  2. Step 2: Convert to fraction form
    77,105/120,982 = 120,982/x
  3. Step 3: Cross multiply
    77,105x = 120,982 × 120,982
  4. Step 4: Simplify right side
    77,105x = 14,636,644,324
  5. Step 5: Solve for x
    x = 14,636,644,324/77,105
  6. Step 6: Final answer
    x = 189,827.43

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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.