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Finding the Third Proportional to 121,136 and 173,400

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Solution

The third proportional to 121,136 and 173,400 is: 248,213.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,136 : 173,400 = 173,400 : x
  2. Step 2: Convert to fraction form
    121,136/173,400 = 173,400/x
  3. Step 3: Cross multiply
    121,136x = 173,400 × 173,400
  4. Step 4: Simplify right side
    121,136x = 30,067,560,000
  5. Step 5: Solve for x
    x = 30,067,560,000/121,136
  6. Step 6: Final answer
    x = 248,213.25

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.