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Finding the Fourth Proportional to 217,670.91, 326,632.46 and 91,299.89

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Solution

The fourth proportional to 217,670.91, 326,632.46 and 91,299.89 is: 137,002.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,670.91 : 326,632.46 = 91,299.89 : x
  2. Step 2: Convert to fraction form
    217,670.91/326,632.46 = 91,299.89/x
  3. Step 3: Cross multiply
    217,670.91x = 326,632.46 × 91,299.89
  4. Step 4: Simplify right side
    217,670.91x = 29,821,505,578.77
  5. Step 5: Solve for x
    x = 29,821,505,578.77/217,670.91
  6. Step 6: Final answer
    x = 137,002.71

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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.