Home / 129,698.88-179,132.07-87,183.60

Finding the Fourth Proportional to 129,698.88, 179,132.07 and 87,183.60

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Solution

The fourth proportional to 129,698.88, 179,132.07 and 87,183.60 is: 120,412.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,698.88 : 179,132.07 = 87,183.60 : x
  2. Step 2: Convert to fraction form
    129,698.88/179,132.07 = 87,183.60/x
  3. Step 3: Cross multiply
    129,698.88x = 179,132.07 × 87,183.60
  4. Step 4: Simplify right side
    129,698.88x = 15,617,378,738.05
  5. Step 5: Solve for x
    x = 15,617,378,738.05/129,698.88
  6. Step 6: Final answer
    x = 120,412.60

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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.