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Finding the Fourth Proportional to 57,791.94, 86,712.95 and 20,378.73

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Solution

The fourth proportional to 57,791.94, 86,712.95 and 20,378.73 is: 30,576.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,791.94 : 86,712.95 = 20,378.73 : x
  2. Step 2: Convert to fraction form
    57,791.94/86,712.95 = 20,378.73/x
  3. Step 3: Cross multiply
    57,791.94x = 86,712.95 × 20,378.73
  4. Step 4: Simplify right side
    57,791.94x = 1,767,099,795.55
  5. Step 5: Solve for x
    x = 1,767,099,795.55/57,791.94
  6. Step 6: Final answer
    x = 30,576.92

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1.5x scale

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.