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Finding the Fourth Proportional to 40,425.20, 60,648.60 and 36,072.80

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Solution

The fourth proportional to 40,425.20, 60,648.60 and 36,072.80 is: 54,118.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,425.20 : 60,648.60 = 36,072.80 : x
  2. Step 2: Convert to fraction form
    40,425.20/60,648.60 = 36,072.80/x
  3. Step 3: Cross multiply
    40,425.20x = 60,648.60 × 36,072.80
  4. Step 4: Simplify right side
    40,425.20x = 2,187,764,818.08
  5. Step 5: Solve for x
    x = 2,187,764,818.08/40,425.20
  6. Step 6: Final answer
    x = 54,118.84

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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.