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Finding the Third Proportional to 33,639 and 71,378

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Solution

The third proportional to 33,639 and 71,378 is: 151,455.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,639 : 71,378 = 71,378 : x
  2. Step 2: Convert to fraction form
    33,639/71,378 = 71,378/x
  3. Step 3: Cross multiply
    33,639x = 71,378 × 71,378
  4. Step 4: Simplify right side
    33,639x = 5,094,818,884
  5. Step 5: Solve for x
    x = 5,094,818,884/33,639
  6. Step 6: Final answer
    x = 151,455.72

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.