Home / 90,879.85-136,310.07-31,716.64

Finding the Fourth Proportional to 90,879.85, 136,310.07 and 31,716.64

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Solution

The fourth proportional to 90,879.85, 136,310.07 and 31,716.64 is: 47,571.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,879.85 : 136,310.07 = 31,716.64 : x
  2. Step 2: Convert to fraction form
    90,879.85/136,310.07 = 31,716.64/x
  3. Step 3: Cross multiply
    90,879.85x = 136,310.07 × 31,716.64
  4. Step 4: Simplify right side
    90,879.85x = 4,323,297,418.56
  5. Step 5: Solve for x
    x = 4,323,297,418.56/90,879.85
  6. Step 6: Final answer
    x = 47,571.57

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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.