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Finding the Third Proportional to 42,309 and 91,908

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Solution

The third proportional to 42,309 and 91,908 is: 199,652.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,309 : 91,908 = 91,908 : x
  2. Step 2: Convert to fraction form
    42,309/91,908 = 91,908/x
  3. Step 3: Cross multiply
    42,309x = 91,908 × 91,908
  4. Step 4: Simplify right side
    42,309x = 8,447,080,464
  5. Step 5: Solve for x
    x = 8,447,080,464/42,309
  6. Step 6: Final answer
    x = 199,652.09

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.