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Finding the Fourth Proportional to 99,958.36, 149,986.42 and 43,790.80

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Solution

The fourth proportional to 99,958.36, 149,986.42 and 43,790.80 is: 65,707.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,958.36 : 149,986.42 = 43,790.80 : x
  2. Step 2: Convert to fraction form
    99,958.36/149,986.42 = 43,790.80/x
  3. Step 3: Cross multiply
    99,958.36x = 149,986.42 × 43,790.80
  4. Step 4: Simplify right side
    99,958.36x = 6,568,025,320.94
  5. Step 5: Solve for x
    x = 6,568,025,320.94/99,958.36
  6. Step 6: Final answer
    x = 65,707.61

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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.