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Finding the Fourth Proportional to 57,793.94, 86,715.95 and 20,380.74

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Solution

The fourth proportional to 57,793.94, 86,715.95 and 20,380.74 is: 30,579.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,793.94 : 86,715.95 = 20,380.74 : x
  2. Step 2: Convert to fraction form
    57,793.94/86,715.95 = 20,380.74/x
  3. Step 3: Cross multiply
    57,793.94x = 86,715.95 × 20,380.74
  4. Step 4: Simplify right side
    57,793.94x = 1,767,335,128.90
  5. Step 5: Solve for x
    x = 1,767,335,128.90/57,793.94
  6. Step 6: Final answer
    x = 30,579.94

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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.