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Finding the Third Proportional to 100,724 and 211,814

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Solution

The third proportional to 100,724 and 211,814 is: 445,426.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,724 : 211,814 = 211,814 : x
  2. Step 2: Convert to fraction form
    100,724/211,814 = 211,814/x
  3. Step 3: Cross multiply
    100,724x = 211,814 × 211,814
  4. Step 4: Simplify right side
    100,724x = 44,865,170,596
  5. Step 5: Solve for x
    x = 44,865,170,596/100,724
  6. Step 6: Final answer
    x = 445,426.82

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.