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Finding the Fourth Proportional to 57,695.21, 86,581.46 and 20,255.39

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Solution

The fourth proportional to 57,695.21, 86,581.46 and 20,255.39 is: 30,396.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,695.21 : 86,581.46 = 20,255.39 : x
  2. Step 2: Convert to fraction form
    57,695.21/86,581.46 = 20,255.39/x
  3. Step 3: Cross multiply
    57,695.21x = 86,581.46 × 20,255.39
  4. Step 4: Simplify right side
    57,695.21x = 1,753,741,181.48
  5. Step 5: Solve for x
    x = 1,753,741,181.48/57,695.21
  6. Step 6: Final answer
    x = 30,396.65

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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.