Home / 129,722.11-179,028.83-81,331.70

Finding the Fourth Proportional to 129,722.11, 179,028.83 and 81,331.70

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Solution

The fourth proportional to 129,722.11, 179,028.83 and 81,331.70 is: 112,245.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,722.11 : 179,028.83 = 81,331.70 : x
  2. Step 2: Convert to fraction form
    129,722.11/179,028.83 = 81,331.70/x
  3. Step 3: Cross multiply
    129,722.11x = 179,028.83 × 81,331.70
  4. Step 4: Simplify right side
    129,722.11x = 14,560,718,401.10
  5. Step 5: Solve for x
    x = 14,560,718,401.10/129,722.11
  6. Step 6: Final answer
    x = 112,245.47

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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.