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Finding the Third Proportional to 99,902 and 212,516

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Solution

The third proportional to 99,902 and 212,516 is: 452,073.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,902 : 212,516 = 212,516 : x
  2. Step 2: Convert to fraction form
    99,902/212,516 = 212,516/x
  3. Step 3: Cross multiply
    99,902x = 212,516 × 212,516
  4. Step 4: Simplify right side
    99,902x = 45,163,050,256
  5. Step 5: Solve for x
    x = 45,163,050,256/99,902
  6. Step 6: Final answer
    x = 452,073.53

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.