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Finding the Fourth Proportional to 100,388.36, 150,286.69 and 87,932.74

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Solution

The fourth proportional to 100,388.36, 150,286.69 and 87,932.74 is: 131,639.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,388.36 : 150,286.69 = 87,932.74 : x
  2. Step 2: Convert to fraction form
    100,388.36/150,286.69 = 87,932.74/x
  3. Step 3: Cross multiply
    100,388.36x = 150,286.69 × 87,932.74
  4. Step 4: Simplify right side
    100,388.36x = 13,215,120,453.22
  5. Step 5: Solve for x
    x = 13,215,120,453.22/100,388.36
  6. Step 6: Final answer
    x = 131,639.96

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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.