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Finding the Fourth Proportional to 86,138.56, 129,240.78 and 33,584.68

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Solution

The fourth proportional to 86,138.56, 129,240.78 and 33,584.68 is: 50,389.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,138.56 : 129,240.78 = 33,584.68 : x
  2. Step 2: Convert to fraction form
    86,138.56/129,240.78 = 33,584.68/x
  3. Step 3: Cross multiply
    86,138.56x = 129,240.78 × 33,584.68
  4. Step 4: Simplify right side
    86,138.56x = 4,340,510,239.25
  5. Step 5: Solve for x
    x = 4,340,510,239.25/86,138.56
  6. Step 6: Final answer
    x = 50,389.86

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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.