Home / 129,789.76-179,109.86-70,173.76

Finding the Fourth Proportional to 129,789.76, 179,109.86 and 70,173.76

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Solution

The fourth proportional to 129,789.76, 179,109.86 and 70,173.76 is: 96,839.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,789.76 : 179,109.86 = 70,173.76 : x
  2. Step 2: Convert to fraction form
    129,789.76/179,109.86 = 70,173.76/x
  3. Step 3: Cross multiply
    129,789.76x = 179,109.86 × 70,173.76
  4. Step 4: Simplify right side
    129,789.76x = 12,568,812,329.27
  5. Step 5: Solve for x
    x = 12,568,812,329.27/129,789.76
  6. Step 6: Final answer
    x = 96,839.78

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1.5x scale

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.