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Finding the Third Proportional to 99,690 and 217,956

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Solution

The third proportional to 99,690 and 217,956 is: 476,525.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,690 : 217,956 = 217,956 : x
  2. Step 2: Convert to fraction form
    99,690/217,956 = 217,956/x
  3. Step 3: Cross multiply
    99,690x = 217,956 × 217,956
  4. Step 4: Simplify right side
    99,690x = 47,504,817,936
  5. Step 5: Solve for x
    x = 47,504,817,936/99,690
  6. Step 6: Final answer
    x = 476,525.41

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.