Home / 85,523.20-128,198.40-38,809.60

Finding the Fourth Proportional to 85,523.20, 128,198.40 and 38,809.60

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Solution

The fourth proportional to 85,523.20, 128,198.40 and 38,809.60 is: 58,175.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,523.20 : 128,198.40 = 38,809.60 : x
  2. Step 2: Convert to fraction form
    85,523.20/128,198.40 = 38,809.60/x
  3. Step 3: Cross multiply
    85,523.20x = 128,198.40 × 38,809.60
  4. Step 4: Simplify right side
    85,523.20x = 4,975,328,624.64
  5. Step 5: Solve for x
    x = 4,975,328,624.64/85,523.20
  6. Step 6: Final answer
    x = 58,175.19

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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.