Home / 129,872.72-179,193.91-78,884.03

Finding the Fourth Proportional to 129,872.72, 179,193.91 and 78,884.03

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Solution

The fourth proportional to 129,872.72, 179,193.91 and 78,884.03 is: 108,841.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,872.72 : 179,193.91 = 78,884.03 : x
  2. Step 2: Convert to fraction form
    129,872.72/179,193.91 = 78,884.03/x
  3. Step 3: Cross multiply
    129,872.72x = 179,193.91 × 78,884.03
  4. Step 4: Simplify right side
    129,872.72x = 14,135,536,481.87
  5. Step 5: Solve for x
    x = 14,135,536,481.87/129,872.72
  6. Step 6: Final answer
    x = 108,841.46

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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.