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Finding the Fourth Proportional to 72,324.72, 108,475.92 and 19,738.44

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Solution

The fourth proportional to 72,324.72, 108,475.92 and 19,738.44 is: 29,604.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,324.72 : 108,475.92 = 19,738.44 : x
  2. Step 2: Convert to fraction form
    72,324.72/108,475.92 = 19,738.44/x
  3. Step 3: Cross multiply
    72,324.72x = 108,475.92 × 19,738.44
  4. Step 4: Simplify right side
    72,324.72x = 2,141,145,438.36
  5. Step 5: Solve for x
    x = 2,141,145,438.36/72,324.72
  6. Step 6: Final answer
    x = 29,604.61

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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.