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Finding the Fourth Proportional to 57,121.60, 85,682.40 and 40,500.40

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Solution

The fourth proportional to 57,121.60, 85,682.40 and 40,500.40 is: 60,750.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,121.60 : 85,682.40 = 40,500.40 : x
  2. Step 2: Convert to fraction form
    57,121.60/85,682.40 = 40,500.40/x
  3. Step 3: Cross multiply
    57,121.60x = 85,682.40 × 40,500.40
  4. Step 4: Simplify right side
    57,121.60x = 3,470,171,472.96
  5. Step 5: Solve for x
    x = 3,470,171,472.96/57,121.60
  6. Step 6: Final answer
    x = 60,750.60

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.