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Finding the Fourth Proportional to 79,644.38, 119,383.94 and 39,636.86

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Solution

The fourth proportional to 79,644.38, 119,383.94 and 39,636.86 is: 59,414.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,644.38 : 119,383.94 = 39,636.86 : x
  2. Step 2: Convert to fraction form
    79,644.38/119,383.94 = 39,636.86/x
  3. Step 3: Cross multiply
    79,644.38x = 119,383.94 × 39,636.86
  4. Step 4: Simplify right side
    79,644.38x = 4,732,004,516.03
  5. Step 5: Solve for x
    x = 4,732,004,516.03/79,644.38
  6. Step 6: Final answer
    x = 59,414.17

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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.