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Finding the Fourth Proportional to 57,079.60, 85,619.40 and 40,458.40

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Solution

The fourth proportional to 57,079.60, 85,619.40 and 40,458.40 is: 60,687.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,079.60 : 85,619.40 = 40,458.40 : x
  2. Step 2: Convert to fraction form
    57,079.60/85,619.40 = 40,458.40/x
  3. Step 3: Cross multiply
    57,079.60x = 85,619.40 × 40,458.40
  4. Step 4: Simplify right side
    57,079.60x = 3,464,023,932.96
  5. Step 5: Solve for x
    x = 3,464,023,932.96/57,079.60
  6. Step 6: Final answer
    x = 60,687.60

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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.