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Finding the Fourth Proportional to 66,816.52, 100,245.66 and 40,191.56

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Solution

The fourth proportional to 66,816.52, 100,245.66 and 40,191.56 is: 60,299.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,816.52 : 100,245.66 = 40,191.56 : x
  2. Step 2: Convert to fraction form
    66,816.52/100,245.66 = 40,191.56/x
  3. Step 3: Cross multiply
    66,816.52x = 100,245.66 × 40,191.56
  4. Step 4: Simplify right side
    66,816.52x = 4,029,029,458.63
  5. Step 5: Solve for x
    x = 4,029,029,458.63/66,816.52
  6. Step 6: Final answer
    x = 60,299.90

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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.