Home / 285,785.28-428,619.60-108,231.12

Finding the Fourth Proportional to 285,785.28, 428,619.60 and 108,231.12

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Solution

The fourth proportional to 285,785.28, 428,619.60 and 108,231.12 is: 162,324.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,785.28 : 428,619.60 = 108,231.12 : x
  2. Step 2: Convert to fraction form
    285,785.28/428,619.60 = 108,231.12/x
  3. Step 3: Cross multiply
    285,785.28x = 428,619.60 × 108,231.12
  4. Step 4: Simplify right side
    285,785.28x = 46,389,979,361.95
  5. Step 5: Solve for x
    x = 46,389,979,361.95/285,785.28
  6. Step 6: Final answer
    x = 162,324.59

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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.