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Finding the Fourth Proportional to 192,685.80, 289,028.70 and 68,039.40

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Solution

The fourth proportional to 192,685.80, 289,028.70 and 68,039.40 is: 102,059.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,685.80 : 289,028.70 = 68,039.40 : x
  2. Step 2: Convert to fraction form
    192,685.80/289,028.70 = 68,039.40/x
  3. Step 3: Cross multiply
    192,685.80x = 289,028.70 × 68,039.40
  4. Step 4: Simplify right side
    192,685.80x = 19,665,339,330.78
  5. Step 5: Solve for x
    x = 19,665,339,330.78/192,685.80
  6. Step 6: Final answer
    x = 102,059.10

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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.