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Finding the Fourth Proportional to 193,140.60, 289,739.70 and 68,471.80

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Solution

The fourth proportional to 193,140.60, 289,739.70 and 68,471.80 is: 102,717.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,140.60 : 289,739.70 = 68,471.80 : x
  2. Step 2: Convert to fraction form
    193,140.60/289,739.70 = 68,471.80/x
  3. Step 3: Cross multiply
    193,140.60x = 289,739.70 × 68,471.80
  4. Step 4: Simplify right side
    193,140.60x = 19,838,998,790.46
  5. Step 5: Solve for x
    x = 19,838,998,790.46/193,140.60
  6. Step 6: Final answer
    x = 102,717.91

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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.