Home / 129,790.88-178,949.14-108,311.57

Finding the Fourth Proportional to 129,790.88, 178,949.14 and 108,311.57

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Solution

The fourth proportional to 129,790.88, 178,949.14 and 108,311.57 is: 149,334.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,790.88 : 178,949.14 = 108,311.57 : x
  2. Step 2: Convert to fraction form
    129,790.88/178,949.14 = 108,311.57/x
  3. Step 3: Cross multiply
    129,790.88x = 178,949.14 × 108,311.57
  4. Step 4: Simplify right side
    129,790.88x = 19,382,261,138.03
  5. Step 5: Solve for x
    x = 19,382,261,138.03/129,790.88
  6. Step 6: Final answer
    x = 149,334.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.