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Finding the Third Proportional to 30,912 and 66,631

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Solution

The third proportional to 30,912 and 66,631 is: 143,623.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,912 : 66,631 = 66,631 : x
  2. Step 2: Convert to fraction form
    30,912/66,631 = 66,631/x
  3. Step 3: Cross multiply
    30,912x = 66,631 × 66,631
  4. Step 4: Simplify right side
    30,912x = 4,439,690,161
  5. Step 5: Solve for x
    x = 4,439,690,161/30,912
  6. Step 6: Final answer
    x = 143,623.52

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.