Home / 129,872.13-179,221.78-72,512.33

Finding the Fourth Proportional to 129,872.13, 179,221.78 and 72,512.33

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Solution

The fourth proportional to 129,872.13, 179,221.78 and 72,512.33 is: 100,066.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,872.13 : 179,221.78 = 72,512.33 : x
  2. Step 2: Convert to fraction form
    129,872.13/179,221.78 = 72,512.33/x
  3. Step 3: Cross multiply
    129,872.13x = 179,221.78 × 72,512.33
  4. Step 4: Simplify right side
    129,872.13x = 12,995,788,854.55
  5. Step 5: Solve for x
    x = 12,995,788,854.55/129,872.13
  6. Step 6: Final answer
    x = 100,066.03

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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.