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Finding the Fourth Proportional to 192,691.80, 289,037.70 and 103,899.60

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Solution

The fourth proportional to 192,691.80, 289,037.70 and 103,899.60 is: 155,849.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,691.80 : 289,037.70 = 103,899.60 : x
  2. Step 2: Convert to fraction form
    192,691.80/289,037.70 = 103,899.60/x
  3. Step 3: Cross multiply
    192,691.80x = 289,037.70 × 103,899.60
  4. Step 4: Simplify right side
    192,691.80x = 30,030,901,414.92
  5. Step 5: Solve for x
    x = 30,030,901,414.92/192,691.80
  6. Step 6: Final answer
    x = 155,849.40

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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.