Home / 129,731.88-179,029.69-73,142.85

Finding the Fourth Proportional to 129,731.88, 179,029.69 and 73,142.85

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Solution

The fourth proportional to 129,731.88, 179,029.69 and 73,142.85 is: 100,936.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,731.88 : 179,029.69 = 73,142.85 : x
  2. Step 2: Convert to fraction form
    129,731.88/179,029.69 = 73,142.85/x
  3. Step 3: Cross multiply
    129,731.88x = 179,029.69 × 73,142.85
  4. Step 4: Simplify right side
    129,731.88x = 13,094,741,761.22
  5. Step 5: Solve for x
    x = 13,094,741,761.22/129,731.88
  6. Step 6: Final answer
    x = 100,936.96

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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.