Home / 85,505.20-128,257.80-35,568.70

Finding the Fourth Proportional to 85,505.20, 128,257.80 and 35,568.70

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Solution

The fourth proportional to 85,505.20, 128,257.80 and 35,568.70 is: 53,353.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,505.20 : 128,257.80 = 35,568.70 : x
  2. Step 2: Convert to fraction form
    85,505.20/128,257.80 = 35,568.70/x
  3. Step 3: Cross multiply
    85,505.20x = 128,257.80 × 35,568.70
  4. Step 4: Simplify right side
    85,505.20x = 4,561,963,210.86
  5. Step 5: Solve for x
    x = 4,561,963,210.86/85,505.20
  6. Step 6: Final answer
    x = 53,353.05

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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.