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Finding the Fourth Proportional to 57,181.55, 85,745.66 and 30,520.33

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Solution

The fourth proportional to 57,181.55, 85,745.66 and 30,520.33 is: 45,766.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,181.55 : 85,745.66 = 30,520.33 : x
  2. Step 2: Convert to fraction form
    57,181.55/85,745.66 = 30,520.33/x
  3. Step 3: Cross multiply
    57,181.55x = 85,745.66 × 30,520.33
  4. Step 4: Simplify right side
    57,181.55x = 2,616,985,472.30
  5. Step 5: Solve for x
    x = 2,616,985,472.30/57,181.55
  6. Step 6: Final answer
    x = 45,766.26

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1.5x scale

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.