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Finding the Third Proportional to 139,986 and 207,711

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Solution

The third proportional to 139,986 and 207,711 is: 308,201.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,986 : 207,711 = 207,711 : x
  2. Step 2: Convert to fraction form
    139,986/207,711 = 207,711/x
  3. Step 3: Cross multiply
    139,986x = 207,711 × 207,711
  4. Step 4: Simplify right side
    139,986x = 43,143,859,521
  5. Step 5: Solve for x
    x = 43,143,859,521/139,986
  6. Step 6: Final answer
    x = 308,201.25

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.