Home / 82,120.94-123,181.18-19,791.44

Finding the Fourth Proportional to 82,120.94, 123,181.18 and 19,791.44

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Solution

The fourth proportional to 82,120.94, 123,181.18 and 19,791.44 is: 29,687.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,120.94 : 123,181.18 = 19,791.44 : x
  2. Step 2: Convert to fraction form
    82,120.94/123,181.18 = 19,791.44/x
  3. Step 3: Cross multiply
    82,120.94x = 123,181.18 × 19,791.44
  4. Step 4: Simplify right side
    82,120.94x = 2,437,932,785.31
  5. Step 5: Solve for x
    x = 2,437,932,785.31/82,120.94
  6. Step 6: Final answer
    x = 29,687.10

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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.