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Finding the Third Proportional to 33,421 and 71,865

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Solution

The third proportional to 33,421 and 71,865 is: 154,530.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,421 : 71,865 = 71,865 : x
  2. Step 2: Convert to fraction form
    33,421/71,865 = 71,865/x
  3. Step 3: Cross multiply
    33,421x = 71,865 × 71,865
  4. Step 4: Simplify right side
    33,421x = 5,164,578,225
  5. Step 5: Solve for x
    x = 5,164,578,225/33,421
  6. Step 6: Final answer
    x = 154,530.93

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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.