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Finding the Third Proportional to 68,163.75 and 139,729.50

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Solution

The third proportional to 68,163.75 and 139,729.50 is: 286,432.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,163.75 : 139,729.50 = 139,729.50 : x
  2. Step 2: Convert to fraction form
    68,163.75/139,729.50 = 139,729.50/x
  3. Step 3: Cross multiply
    68,163.75x = 139,729.50 × 139,729.50
  4. Step 4: Simplify right side
    68,163.75x = 19,524,333,170.25
  5. Step 5: Solve for x
    x = 19,524,333,170.25/68,163.75
  6. Step 6: Final answer
    x = 286,432.79

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.