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Finding the Fourth Proportional to 192,696.20, 289,029.90 and 80,347.40

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Solution

The fourth proportional to 192,696.20, 289,029.90 and 80,347.40 is: 120,515.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,696.20 : 289,029.90 = 80,347.40 : x
  2. Step 2: Convert to fraction form
    192,696.20/289,029.90 = 80,347.40/x
  3. Step 3: Cross multiply
    192,696.20x = 289,029.90 × 80,347.40
  4. Step 4: Simplify right side
    192,696.20x = 23,222,800,987.26
  5. Step 5: Solve for x
    x = 23,222,800,987.26/192,696.20
  6. Step 6: Final answer
    x = 120,515.10

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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.