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Finding the Fourth Proportional to 217,425.78, 326,250 and 99,081.90

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Solution

The fourth proportional to 217,425.78, 326,250 and 99,081.90 is: 148,673.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,425.78 : 326,250 = 99,081.90 : x
  2. Step 2: Convert to fraction form
    217,425.78/326,250 = 99,081.90/x
  3. Step 3: Cross multiply
    217,425.78x = 326,250 × 99,081.90
  4. Step 4: Simplify right side
    217,425.78x = 32,325,469,875
  5. Step 5: Solve for x
    x = 32,325,469,875/217,425.78
  6. Step 6: Final answer
    x = 148,673.58

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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.