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Finding the Fourth Proportional to 66,121.81, 91,247.81 and 35,906.88

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Solution

The fourth proportional to 66,121.81, 91,247.81 and 35,906.88 is: 49,551.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,121.81 : 91,247.81 = 35,906.88 : x
  2. Step 2: Convert to fraction form
    66,121.81/91,247.81 = 35,906.88/x
  3. Step 3: Cross multiply
    66,121.81x = 91,247.81 × 35,906.88
  4. Step 4: Simplify right side
    66,121.81x = 3,276,424,163.93
  5. Step 5: Solve for x
    x = 3,276,424,163.93/66,121.81
  6. Step 6: Final answer
    x = 49,551.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.