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Finding the Third Proportional to 163,876 and 221,410

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Solution

The third proportional to 163,876 and 221,410 is: 299,143.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,876 : 221,410 = 221,410 : x
  2. Step 2: Convert to fraction form
    163,876/221,410 = 221,410/x
  3. Step 3: Cross multiply
    163,876x = 221,410 × 221,410
  4. Step 4: Simplify right side
    163,876x = 49,022,388,100
  5. Step 5: Solve for x
    x = 49,022,388,100/163,876
  6. Step 6: Final answer
    x = 299,143.18

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.