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Finding the Fourth Proportional to 74,399.92, 102,672.63 and 40,408.73

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Solution

The fourth proportional to 74,399.92, 102,672.63 and 40,408.73 is: 55,764.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,399.92 : 102,672.63 = 40,408.73 : x
  2. Step 2: Convert to fraction form
    74,399.92/102,672.63 = 40,408.73/x
  3. Step 3: Cross multiply
    74,399.92x = 102,672.63 × 40,408.73
  4. Step 4: Simplify right side
    74,399.92x = 4,148,870,070.70
  5. Step 5: Solve for x
    x = 4,148,870,070.70/74,399.92
  6. Step 6: Final answer
    x = 55,764.44

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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.