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Finding the Fourth Proportional to 72,517.70, 100,072.87 and 40,250.43

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Solution

The fourth proportional to 72,517.70, 100,072.87 and 40,250.43 is: 55,544.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,517.70 : 100,072.87 = 40,250.43 : x
  2. Step 2: Convert to fraction form
    72,517.70/100,072.87 = 40,250.43/x
  3. Step 3: Cross multiply
    72,517.70x = 100,072.87 × 40,250.43
  4. Step 4: Simplify right side
    72,517.70x = 4,027,975,948.21
  5. Step 5: Solve for x
    x = 4,027,975,948.21/72,517.70
  6. Step 6: Final answer
    x = 55,544.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.