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Finding the Fourth Proportional to 66,120.87, 99,187.61 and 18,736.95

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Solution

The fourth proportional to 66,120.87, 99,187.61 and 18,736.95 is: 28,107.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,120.87 : 99,187.61 = 18,736.95 : x
  2. Step 2: Convert to fraction form
    66,120.87/99,187.61 = 18,736.95/x
  3. Step 3: Cross multiply
    66,120.87x = 99,187.61 × 18,736.95
  4. Step 4: Simplify right side
    66,120.87x = 1,858,473,289.19
  5. Step 5: Solve for x
    x = 1,858,473,289.19/66,120.87
  6. Step 6: Final answer
    x = 28,107.21

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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.