Home / 129,701.07-178,990.23-73,112.43

Finding the Fourth Proportional to 129,701.07, 178,990.23 and 73,112.43

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Solution

The fourth proportional to 129,701.07, 178,990.23 and 73,112.43 is: 100,896.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,701.07 : 178,990.23 = 73,112.43 : x
  2. Step 2: Convert to fraction form
    129,701.07/178,990.23 = 73,112.43/x
  3. Step 3: Cross multiply
    129,701.07x = 178,990.23 × 73,112.43
  4. Step 4: Simplify right side
    129,701.07x = 13,086,410,661.56
  5. Step 5: Solve for x
    x = 13,086,410,661.56/129,701.07
  6. Step 6: Final answer
    x = 100,896.71

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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.