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Finding the Fourth Proportional to 204,958.14, 307,469.81 and 86,630.50

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Solution

The fourth proportional to 204,958.14, 307,469.81 and 86,630.50 is: 129,959.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,958.14 : 307,469.81 = 86,630.50 : x
  2. Step 2: Convert to fraction form
    204,958.14/307,469.81 = 86,630.50/x
  3. Step 3: Cross multiply
    204,958.14x = 307,469.81 × 86,630.50
  4. Step 4: Simplify right side
    204,958.14x = 26,636,263,375.21
  5. Step 5: Solve for x
    x = 26,636,263,375.21/204,958.14
  6. Step 6: Final answer
    x = 129,959.53

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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.