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Finding the Fourth Proportional to 72,394.92, 108,552.90 and 21,786.54

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Solution

The fourth proportional to 72,394.92, 108,552.90 and 21,786.54 is: 32,667.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,394.92 : 108,552.90 = 21,786.54 : x
  2. Step 2: Convert to fraction form
    72,394.92/108,552.90 = 21,786.54/x
  3. Step 3: Cross multiply
    72,394.92x = 108,552.90 × 21,786.54
  4. Step 4: Simplify right side
    72,394.92x = 2,364,992,097.97
  5. Step 5: Solve for x
    x = 2,364,992,097.97/72,394.92
  6. Step 6: Final answer
    x = 32,667.93

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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.