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Finding the Third Proportional to 67,986 and 145,816

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Solution

The third proportional to 67,986 and 145,816 is: 312,745.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,986 : 145,816 = 145,816 : x
  2. Step 2: Convert to fraction form
    67,986/145,816 = 145,816/x
  3. Step 3: Cross multiply
    67,986x = 145,816 × 145,816
  4. Step 4: Simplify right side
    67,986x = 21,262,305,856
  5. Step 5: Solve for x
    x = 21,262,305,856/67,986
  6. Step 6: Final answer
    x = 312,745.36

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.