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Finding the Fourth Proportional to 61,197.80, 91,791.30 and 16,820.60

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Solution

The fourth proportional to 61,197.80, 91,791.30 and 16,820.60 is: 25,229.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,197.80 : 91,791.30 = 16,820.60 : x
  2. Step 2: Convert to fraction form
    61,197.80/91,791.30 = 16,820.60/x
  3. Step 3: Cross multiply
    61,197.80x = 91,791.30 × 16,820.60
  4. Step 4: Simplify right side
    61,197.80x = 1,543,984,740.78
  5. Step 5: Solve for x
    x = 1,543,984,740.78/61,197.80
  6. Step 6: Final answer
    x = 25,229.42

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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.