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Finding the Fourth Proportional to 217,340.67, 325,983.29 and 84,129.78

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Solution

The fourth proportional to 217,340.67, 325,983.29 and 84,129.78 is: 126,183.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,340.67 : 325,983.29 = 84,129.78 : x
  2. Step 2: Convert to fraction form
    217,340.67/325,983.29 = 84,129.78/x
  3. Step 3: Cross multiply
    217,340.67x = 325,983.29 × 84,129.78
  4. Step 4: Simplify right side
    217,340.67x = 27,424,902,050.73
  5. Step 5: Solve for x
    x = 27,424,902,050.73/217,340.67
  6. Step 6: Final answer
    x = 126,183.94

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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.