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Finding the Third Proportional to 67,985 and 145,811

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Solution

The third proportional to 67,985 and 145,811 is: 312,728.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,985 : 145,811 = 145,811 : x
  2. Step 2: Convert to fraction form
    67,985/145,811 = 145,811/x
  3. Step 3: Cross multiply
    67,985x = 145,811 × 145,811
  4. Step 4: Simplify right side
    67,985x = 21,260,847,721
  5. Step 5: Solve for x
    x = 21,260,847,721/67,985
  6. Step 6: Final answer
    x = 312,728.51

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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.