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Finding the Third Proportional to 120,786 and 180,891

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Solution

The third proportional to 120,786 and 180,891 is: 270,905.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,786 : 180,891 = 180,891 : x
  2. Step 2: Convert to fraction form
    120,786/180,891 = 180,891/x
  3. Step 3: Cross multiply
    120,786x = 180,891 × 180,891
  4. Step 4: Simplify right side
    120,786x = 32,721,553,881
  5. Step 5: Solve for x
    x = 32,721,553,881/120,786
  6. Step 6: Final answer
    x = 270,905.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.