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Finding the Third Proportional to 100,407 and 209,138

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Solution

The third proportional to 100,407 and 209,138 is: 435,614.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,407 : 209,138 = 209,138 : x
  2. Step 2: Convert to fraction form
    100,407/209,138 = 209,138/x
  3. Step 3: Cross multiply
    100,407x = 209,138 × 209,138
  4. Step 4: Simplify right side
    100,407x = 43,738,703,044
  5. Step 5: Solve for x
    x = 43,738,703,044/100,407
  6. Step 6: Final answer
    x = 435,614.08

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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.