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Finding the Third Proportional to 120,431 and 169,444

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Solution

The third proportional to 120,431 and 169,444 is: 238,404.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,431 : 169,444 = 169,444 : x
  2. Step 2: Convert to fraction form
    120,431/169,444 = 169,444/x
  3. Step 3: Cross multiply
    120,431x = 169,444 × 169,444
  4. Step 4: Simplify right side
    120,431x = 28,711,269,136
  5. Step 5: Solve for x
    x = 28,711,269,136/120,431
  6. Step 6: Final answer
    x = 238,404.31

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.