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Finding the Fourth Proportional to 72,447.99, 108,660.31 and 19,845.18

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Solution

The fourth proportional to 72,447.99, 108,660.31 and 19,845.18 is: 29,764.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,447.99 : 108,660.31 = 19,845.18 : x
  2. Step 2: Convert to fraction form
    72,447.99/108,660.31 = 19,845.18/x
  3. Step 3: Cross multiply
    72,447.99x = 108,660.31 × 19,845.18
  4. Step 4: Simplify right side
    72,447.99x = 2,156,383,410.81
  5. Step 5: Solve for x
    x = 2,156,383,410.81/72,447.99
  6. Step 6: Final answer
    x = 29,764.57

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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.