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Finding the Third Proportional to 99,270 and 212,391

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Solution

The third proportional to 99,270 and 212,391 is: 454,416.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,270 : 212,391 = 212,391 : x
  2. Step 2: Convert to fraction form
    99,270/212,391 = 212,391/x
  3. Step 3: Cross multiply
    99,270x = 212,391 × 212,391
  4. Step 4: Simplify right side
    99,270x = 45,109,936,881
  5. Step 5: Solve for x
    x = 45,109,936,881/99,270
  6. Step 6: Final answer
    x = 454,416.61

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.