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Finding the Fourth Proportional to 61,163.42, 91,745.27 and 16,790.78

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Solution

The fourth proportional to 61,163.42, 91,745.27 and 16,790.78 is: 25,186.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,163.42 : 91,745.27 = 16,790.78 : x
  2. Step 2: Convert to fraction form
    61,163.42/91,745.27 = 16,790.78/x
  3. Step 3: Cross multiply
    61,163.42x = 91,745.27 × 16,790.78
  4. Step 4: Simplify right side
    61,163.42x = 1,540,474,644.61
  5. Step 5: Solve for x
    x = 1,540,474,644.61/61,163.42
  6. Step 6: Final answer
    x = 25,186.21

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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.