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Finding the Fourth Proportional to 193,039.80, 289,329.30 and 80,719.80

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Solution

The fourth proportional to 193,039.80, 289,329.30 and 80,719.80 is: 120,983.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,039.80 : 289,329.30 = 80,719.80 : x
  2. Step 2: Convert to fraction form
    193,039.80/289,329.30 = 80,719.80/x
  3. Step 3: Cross multiply
    193,039.80x = 289,329.30 × 80,719.80
  4. Step 4: Simplify right side
    193,039.80x = 23,354,603,230.14
  5. Step 5: Solve for x
    x = 23,354,603,230.14/193,039.80
  6. Step 6: Final answer
    x = 120,983.36

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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.