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Finding the Third Proportional to 99,117 and 206,439

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Solution

The third proportional to 99,117 and 206,439 is: 429,967.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,117 : 206,439 = 206,439 : x
  2. Step 2: Convert to fraction form
    99,117/206,439 = 206,439/x
  3. Step 3: Cross multiply
    99,117x = 206,439 × 206,439
  4. Step 4: Simplify right side
    99,117x = 42,617,060,721
  5. Step 5: Solve for x
    x = 42,617,060,721/99,117
  6. Step 6: Final answer
    x = 429,967.22

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.