Home / 85,694.20-128,578.08-33,140.56

Finding the Fourth Proportional to 85,694.20, 128,578.08 and 33,140.56

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Solution

The fourth proportional to 85,694.20, 128,578.08 and 33,140.56 is: 49,725.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,694.20 : 128,578.08 = 33,140.56 : x
  2. Step 2: Convert to fraction form
    85,694.20/128,578.08 = 33,140.56/x
  3. Step 3: Cross multiply
    85,694.20x = 128,578.08 × 33,140.56
  4. Step 4: Simplify right side
    85,694.20x = 4,261,149,574.92
  5. Step 5: Solve for x
    x = 4,261,149,574.92/85,694.20
  6. Step 6: Final answer
    x = 49,725.06

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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.