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Finding the Third Proportional to 47,639 and 71,223

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Solution

The third proportional to 47,639 and 71,223 is: 106,482.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,639 : 71,223 = 71,223 : x
  2. Step 2: Convert to fraction form
    47,639/71,223 = 71,223/x
  3. Step 3: Cross multiply
    47,639x = 71,223 × 71,223
  4. Step 4: Simplify right side
    47,639x = 5,072,715,729
  5. Step 5: Solve for x
    x = 5,072,715,729/47,639
  6. Step 6: Final answer
    x = 106,482.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.