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Finding the Third Proportional to 30,660 and 71,649

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Solution

The third proportional to 30,660 and 71,649 is: 167,435.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,660 : 71,649 = 71,649 : x
  2. Step 2: Convert to fraction form
    30,660/71,649 = 71,649/x
  3. Step 3: Cross multiply
    30,660x = 71,649 × 71,649
  4. Step 4: Simplify right side
    30,660x = 5,133,579,201
  5. Step 5: Solve for x
    x = 5,133,579,201/30,660
  6. Step 6: Final answer
    x = 167,435.72

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.