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Finding the Third Proportional to 74,991 and 156,912

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Solution

The third proportional to 74,991 and 156,912 is: 328,324.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,991 : 156,912 = 156,912 : x
  2. Step 2: Convert to fraction form
    74,991/156,912 = 156,912/x
  3. Step 3: Cross multiply
    74,991x = 156,912 × 156,912
  4. Step 4: Simplify right side
    74,991x = 24,621,375,744
  5. Step 5: Solve for x
    x = 24,621,375,744/74,991
  6. Step 6: Final answer
    x = 328,324.41

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.