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Finding the Fourth Proportional to 100,443.21, 150,523.97 and 72,230.51

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Solution

The fourth proportional to 100,443.21, 150,523.97 and 72,230.51 is: 108,244.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,443.21 : 150,523.97 = 72,230.51 : x
  2. Step 2: Convert to fraction form
    100,443.21/150,523.97 = 72,230.51/x
  3. Step 3: Cross multiply
    100,443.21x = 150,523.97 × 72,230.51
  4. Step 4: Simplify right side
    100,443.21x = 10,872,422,006.55
  5. Step 5: Solve for x
    x = 10,872,422,006.55/100,443.21
  6. Step 6: Final answer
    x = 108,244.47

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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.