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Finding the Fourth Proportional to 57,286.78, 85,919.04 and 28,816.15

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Solution

The fourth proportional to 57,286.78, 85,919.04 and 28,816.15 is: 43,218.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,286.78 : 85,919.04 = 28,816.15 : x
  2. Step 2: Convert to fraction form
    57,286.78/85,919.04 = 28,816.15/x
  3. Step 3: Cross multiply
    57,286.78x = 85,919.04 × 28,816.15
  4. Step 4: Simplify right side
    57,286.78x = 2,475,855,944.50
  5. Step 5: Solve for x
    x = 2,475,855,944.50/57,286.78
  6. Step 6: Final answer
    x = 43,218.63

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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.