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Finding the Fourth Proportional to 204,818.80, 307,422.60 and 126,086.80

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Solution

The fourth proportional to 204,818.80, 307,422.60 and 126,086.80 is: 189,249.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,818.80 : 307,422.60 = 126,086.80 : x
  2. Step 2: Convert to fraction form
    204,818.80/307,422.60 = 126,086.80/x
  3. Step 3: Cross multiply
    204,818.80x = 307,422.60 × 126,086.80
  4. Step 4: Simplify right side
    204,818.80x = 38,761,931,881.68
  5. Step 5: Solve for x
    x = 38,761,931,881.68/204,818.80
  6. Step 6: Final answer
    x = 189,249.87

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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.