Home / 378,786.52-568,032.12-142,000

Finding the Fourth Proportional to 378,786.52, 568,032.12 and 142,000

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Solution

The fourth proportional to 378,786.52, 568,032.12 and 142,000 is: 212,944.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,786.52 : 568,032.12 = 142,000 : x
  2. Step 2: Convert to fraction form
    378,786.52/568,032.12 = 142,000/x
  3. Step 3: Cross multiply
    378,786.52x = 568,032.12 × 142,000
  4. Step 4: Simplify right side
    378,786.52x = 80,660,561,040
  5. Step 5: Solve for x
    x = 80,660,561,040/378,786.52
  6. Step 6: Final answer
    x = 212,944.65

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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.