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Finding the Fourth Proportional to 90,409.05, 135,630.59 and 36,377.82

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Solution

The fourth proportional to 90,409.05, 135,630.59 and 36,377.82 is: 54,573.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,409.05 : 135,630.59 = 36,377.82 : x
  2. Step 2: Convert to fraction form
    90,409.05/135,630.59 = 36,377.82/x
  3. Step 3: Cross multiply
    90,409.05x = 135,630.59 × 36,377.82
  4. Step 4: Simplify right side
    90,409.05x = 4,933,945,007.62
  5. Step 5: Solve for x
    x = 4,933,945,007.62/90,409.05
  6. Step 6: Final answer
    x = 54,573.57

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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.