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Finding the Fourth Proportional to 57,317.99, 85,978.01 and 19,879.38

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Solution

The fourth proportional to 57,317.99, 85,978.01 and 19,879.38 is: 29,819.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,317.99 : 85,978.01 = 19,879.38 : x
  2. Step 2: Convert to fraction form
    57,317.99/85,978.01 = 19,879.38/x
  3. Step 3: Cross multiply
    57,317.99x = 85,978.01 × 19,879.38
  4. Step 4: Simplify right side
    57,317.99x = 1,709,189,532.43
  5. Step 5: Solve for x
    x = 1,709,189,532.43/57,317.99
  6. Step 6: Final answer
    x = 29,819.43

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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.