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Finding the Fourth Proportional to 193,056.80, 289,623.78 and 66,701.60

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Solution

The fourth proportional to 193,056.80, 289,623.78 and 66,701.60 is: 100,065.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,056.80 : 289,623.78 = 66,701.60 : x
  2. Step 2: Convert to fraction form
    193,056.80/289,623.78 = 66,701.60/x
  3. Step 3: Cross multiply
    193,056.80x = 289,623.78 × 66,701.60
  4. Step 4: Simplify right side
    193,056.80x = 19,318,369,524.05
  5. Step 5: Solve for x
    x = 19,318,369,524.05/193,056.80
  6. Step 6: Final answer
    x = 100,065.73

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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.