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Finding the Third Proportional to 100,108 and 215,728

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Solution

The third proportional to 100,108 and 215,728 is: 464,883.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,108 : 215,728 = 215,728 : x
  2. Step 2: Convert to fraction form
    100,108/215,728 = 215,728/x
  3. Step 3: Cross multiply
    100,108x = 215,728 × 215,728
  4. Step 4: Simplify right side
    100,108x = 46,538,569,984
  5. Step 5: Solve for x
    x = 46,538,569,984/100,108
  6. Step 6: Final answer
    x = 464,883.63

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.