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Finding the Third Proportional to 47,983 and 75,921

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Solution

The third proportional to 47,983 and 75,921 is: 120,125.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,983 : 75,921 = 75,921 : x
  2. Step 2: Convert to fraction form
    47,983/75,921 = 75,921/x
  3. Step 3: Cross multiply
    47,983x = 75,921 × 75,921
  4. Step 4: Simplify right side
    47,983x = 5,763,998,241
  5. Step 5: Solve for x
    x = 5,763,998,241/47,983
  6. Step 6: Final answer
    x = 120,125.84

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.