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Finding the Fourth Proportional to 57,023.60, 85,405.80 and 36,028.40

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Solution

The fourth proportional to 57,023.60, 85,405.80 and 36,028.40 is: 53,960.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,023.60 : 85,405.80 = 36,028.40 : x
  2. Step 2: Convert to fraction form
    57,023.60/85,405.80 = 36,028.40/x
  3. Step 3: Cross multiply
    57,023.60x = 85,405.80 × 36,028.40
  4. Step 4: Simplify right side
    57,023.60x = 3,077,034,324.72
  5. Step 5: Solve for x
    x = 3,077,034,324.72/57,023.60
  6. Step 6: Final answer
    x = 53,960.72

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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.