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Finding the Fourth Proportional to 99,908.43, 149,919.30 and 36,720.33

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Solution

The fourth proportional to 99,908.43, 149,919.30 and 36,720.33 is: 55,101.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,908.43 : 149,919.30 = 36,720.33 : x
  2. Step 2: Convert to fraction form
    99,908.43/149,919.30 = 36,720.33/x
  3. Step 3: Cross multiply
    99,908.43x = 149,919.30 × 36,720.33
  4. Step 4: Simplify right side
    99,908.43x = 5,505,086,169.37
  5. Step 5: Solve for x
    x = 5,505,086,169.37/99,908.43
  6. Step 6: Final answer
    x = 55,101.32

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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.