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Finding the Third Proportional to 70,611.75 and 155,439

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Solution

The third proportional to 70,611.75 and 155,439 is: 342,170.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,611.75 : 155,439 = 155,439 : x
  2. Step 2: Convert to fraction form
    70,611.75/155,439 = 155,439/x
  3. Step 3: Cross multiply
    70,611.75x = 155,439 × 155,439
  4. Step 4: Simplify right side
    70,611.75x = 24,161,282,721
  5. Step 5: Solve for x
    x = 24,161,282,721/70,611.75
  6. Step 6: Final answer
    x = 342,170.85

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.