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Finding the Fourth Proportional to 378,791.52, 568,039.62 and 142,005

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Solution

The fourth proportional to 378,791.52, 568,039.62 and 142,005 is: 212,952.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,791.52 : 568,039.62 = 142,005 : x
  2. Step 2: Convert to fraction form
    378,791.52/568,039.62 = 142,005/x
  3. Step 3: Cross multiply
    378,791.52x = 568,039.62 × 142,005
  4. Step 4: Simplify right side
    378,791.52x = 80,664,466,238.10
  5. Step 5: Solve for x
    x = 80,664,466,238.10/378,791.52
  6. Step 6: Final answer
    x = 212,952.14

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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.