Home / 129,945.36-179,271.18-87,517.56

Finding the Fourth Proportional to 129,945.36, 179,271.18 and 87,517.56

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Solution

The fourth proportional to 129,945.36, 179,271.18 and 87,517.56 is: 120,738.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,945.36 : 179,271.18 = 87,517.56 : x
  2. Step 2: Convert to fraction form
    129,945.36/179,271.18 = 87,517.56/x
  3. Step 3: Cross multiply
    129,945.36x = 179,271.18 × 87,517.56
  4. Step 4: Simplify right side
    129,945.36x = 15,689,376,251.92
  5. Step 5: Solve for x
    x = 15,689,376,251.92/129,945.36
  6. Step 6: Final answer
    x = 120,738.26

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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.