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Finding the Fourth Proportional to 204,042.40, 305,917.80 and 91,630.60

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Solution

The fourth proportional to 204,042.40, 305,917.80 and 91,630.60 is: 137,380.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,042.40 : 305,917.80 = 91,630.60 : x
  2. Step 2: Convert to fraction form
    204,042.40/305,917.80 = 91,630.60/x
  3. Step 3: Cross multiply
    204,042.40x = 305,917.80 × 91,630.60
  4. Step 4: Simplify right side
    204,042.40x = 28,031,431,564.68
  5. Step 5: Solve for x
    x = 28,031,431,564.68/204,042.40
  6. Step 6: Final answer
    x = 137,380.42

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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.