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Finding the Third Proportional to 100,090 and 217,603

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Solution

The third proportional to 100,090 and 217,603 is: 473,084.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,090 : 217,603 = 217,603 : x
  2. Step 2: Convert to fraction form
    100,090/217,603 = 217,603/x
  3. Step 3: Cross multiply
    100,090x = 217,603 × 217,603
  4. Step 4: Simplify right side
    100,090x = 47,351,065,609
  5. Step 5: Solve for x
    x = 47,351,065,609/100,090
  6. Step 6: Final answer
    x = 473,084.88

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.