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Finding the Fourth Proportional to 171,136.05, 256,479.90 and 82,212.63

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Solution

The fourth proportional to 171,136.05, 256,479.90 and 82,212.63 is: 123,211.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,136.05 : 256,479.90 = 82,212.63 : x
  2. Step 2: Convert to fraction form
    171,136.05/256,479.90 = 82,212.63/x
  3. Step 3: Cross multiply
    171,136.05x = 256,479.90 × 82,212.63
  4. Step 4: Simplify right side
    171,136.05x = 21,085,887,121.14
  5. Step 5: Solve for x
    x = 21,085,887,121.14/171,136.05
  6. Step 6: Final answer
    x = 123,211.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.