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Finding the Third Proportional to 138,726 and 209,548

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Solution

The third proportional to 138,726 and 209,548 is: 316,525.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,726 : 209,548 = 209,548 : x
  2. Step 2: Convert to fraction form
    138,726/209,548 = 209,548/x
  3. Step 3: Cross multiply
    138,726x = 209,548 × 209,548
  4. Step 4: Simplify right side
    138,726x = 43,910,364,304
  5. Step 5: Solve for x
    x = 43,910,364,304/138,726
  6. Step 6: Final answer
    x = 316,525.84

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.