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Finding the Fourth Proportional to 216,786.38, 325,310.78 and 92,127.38

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Solution

The fourth proportional to 216,786.38, 325,310.78 and 92,127.38 is: 138,246.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,786.38 : 325,310.78 = 92,127.38 : x
  2. Step 2: Convert to fraction form
    216,786.38/325,310.78 = 92,127.38/x
  3. Step 3: Cross multiply
    216,786.38x = 325,310.78 × 92,127.38
  4. Step 4: Simplify right side
    216,786.38x = 29,970,028,450.92
  5. Step 5: Solve for x
    x = 29,970,028,450.92/216,786.38
  6. Step 6: Final answer
    x = 138,246.83

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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.