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Finding the Fourth Proportional to 86,289.40, 129,414.59 and 33,671.80

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Solution

The fourth proportional to 86,289.40, 129,414.59 and 33,671.80 is: 50,500.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,289.40 : 129,414.59 = 33,671.80 : x
  2. Step 2: Convert to fraction form
    86,289.40/129,414.59 = 33,671.80/x
  3. Step 3: Cross multiply
    86,289.40x = 129,414.59 × 33,671.80
  4. Step 4: Simplify right side
    86,289.40x = 4,357,622,191.56
  5. Step 5: Solve for x
    x = 4,357,622,191.56/86,289.40
  6. Step 6: Final answer
    x = 50,500.09

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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.