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Finding the Fourth Proportional to 90,073.88, 135,090.24 and 33,919.90

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Solution

The fourth proportional to 90,073.88, 135,090.24 and 33,919.90 is: 50,872.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,073.88 : 135,090.24 = 33,919.90 : x
  2. Step 2: Convert to fraction form
    90,073.88/135,090.24 = 33,919.90/x
  3. Step 3: Cross multiply
    90,073.88x = 135,090.24 × 33,919.90
  4. Step 4: Simplify right side
    90,073.88x = 4,582,247,431.78
  5. Step 5: Solve for x
    x = 4,582,247,431.78/90,073.88
  6. Step 6: Final answer
    x = 50,872.10

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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.