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Finding the Third Proportional to 21,990 and 48,354

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Solution

The third proportional to 21,990 and 48,354 is: 106,326.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990 : 48,354 = 48,354 : x
  2. Step 2: Convert to fraction form
    21,990/48,354 = 48,354/x
  3. Step 3: Cross multiply
    21,990x = 48,354 × 48,354
  4. Step 4: Simplify right side
    21,990x = 2,338,109,316
  5. Step 5: Solve for x
    x = 2,338,109,316/21,990
  6. Step 6: Final answer
    x = 106,326.03

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.