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Finding the Fourth Proportional to 57,551, 86,365.65 and 20,615

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Solution

The fourth proportional to 57,551, 86,365.65 and 20,615 is: 30,936.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,551 : 86,365.65 = 20,615 : x
  2. Step 2: Convert to fraction form
    57,551/86,365.65 = 20,615/x
  3. Step 3: Cross multiply
    57,551x = 86,365.65 × 20,615
  4. Step 4: Simplify right side
    57,551x = 1,780,427,874.75
  5. Step 5: Solve for x
    x = 1,780,427,874.75/57,551
  6. Step 6: Final answer
    x = 30,936.52

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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.