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Finding the Fourth Proportional to 217,540.40, 326,051.40 and 91,180.40

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Solution

The fourth proportional to 217,540.40, 326,051.40 and 91,180.40 is: 136,661.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,540.40 : 326,051.40 = 91,180.40 : x
  2. Step 2: Convert to fraction form
    217,540.40/326,051.40 = 91,180.40/x
  3. Step 3: Cross multiply
    217,540.40x = 326,051.40 × 91,180.40
  4. Step 4: Simplify right side
    217,540.40x = 29,729,497,072.56
  5. Step 5: Solve for x
    x = 29,729,497,072.56/217,540.40
  6. Step 6: Final answer
    x = 136,661.96

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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.