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Finding the Third Proportional to 120,788 and 199,633

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Solution

The third proportional to 120,788 and 199,633 is: 329,944.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,788 : 199,633 = 199,633 : x
  2. Step 2: Convert to fraction form
    120,788/199,633 = 199,633/x
  3. Step 3: Cross multiply
    120,788x = 199,633 × 199,633
  4. Step 4: Simplify right side
    120,788x = 39,853,334,689
  5. Step 5: Solve for x
    x = 39,853,334,689/120,788
  6. Step 6: Final answer
    x = 329,944.49

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Why These Related Problems?

These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.