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Finding the Third Proportional to 103,678 and 215,138

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Solution

The third proportional to 103,678 and 215,138 is: 446,424.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,678 : 215,138 = 215,138 : x
  2. Step 2: Convert to fraction form
    103,678/215,138 = 215,138/x
  3. Step 3: Cross multiply
    103,678x = 215,138 × 215,138
  4. Step 4: Simplify right side
    103,678x = 46,284,359,044
  5. Step 5: Solve for x
    x = 46,284,359,044/103,678
  6. Step 6: Final answer
    x = 446,424.11

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.