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Finding the Third Proportional to 63,479 and 139,412

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Solution

The third proportional to 63,479 and 139,412 is: 306,175.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,479 : 139,412 = 139,412 : x
  2. Step 2: Convert to fraction form
    63,479/139,412 = 139,412/x
  3. Step 3: Cross multiply
    63,479x = 139,412 × 139,412
  4. Step 4: Simplify right side
    63,479x = 19,435,705,744
  5. Step 5: Solve for x
    x = 19,435,705,744/63,479
  6. Step 6: Final answer
    x = 306,175.36

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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.