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Finding the Third Proportional to 138,348 and 208,080

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Solution

The third proportional to 138,348 and 208,080 is: 312,959.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,348 : 208,080 = 208,080 : x
  2. Step 2: Convert to fraction form
    138,348/208,080 = 208,080/x
  3. Step 3: Cross multiply
    138,348x = 208,080 × 208,080
  4. Step 4: Simplify right side
    138,348x = 43,297,286,400
  5. Step 5: Solve for x
    x = 43,297,286,400/138,348
  6. Step 6: Final answer
    x = 312,959.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.