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Finding the Third Proportional to 74,865 and 161,721

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Solution

The third proportional to 74,865 and 161,721 is: 349,344.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,865 : 161,721 = 161,721 : x
  2. Step 2: Convert to fraction form
    74,865/161,721 = 161,721/x
  3. Step 3: Cross multiply
    74,865x = 161,721 × 161,721
  4. Step 4: Simplify right side
    74,865x = 26,153,681,841
  5. Step 5: Solve for x
    x = 26,153,681,841/74,865
  6. Step 6: Final answer
    x = 349,344.58

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.