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Finding the Third Proportional to 63,490 and 135,418

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Solution

The third proportional to 63,490 and 135,418 is: 288,833.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,490 : 135,418 = 135,418 : x
  2. Step 2: Convert to fraction form
    63,490/135,418 = 135,418/x
  3. Step 3: Cross multiply
    63,490x = 135,418 × 135,418
  4. Step 4: Simplify right side
    63,490x = 18,338,034,724
  5. Step 5: Solve for x
    x = 18,338,034,724/63,490
  6. Step 6: Final answer
    x = 288,833.43

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.