Home / 129,050.85-178,154.92-80,679.65

Finding the Fourth Proportional to 129,050.85, 178,154.92 and 80,679.65

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Solution

The fourth proportional to 129,050.85, 178,154.92 and 80,679.65 is: 111,378.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,050.85 : 178,154.92 = 80,679.65 : x
  2. Step 2: Convert to fraction form
    129,050.85/178,154.92 = 80,679.65/x
  3. Step 3: Cross multiply
    129,050.85x = 178,154.92 × 80,679.65
  4. Step 4: Simplify right side
    129,050.85x = 14,373,476,793.08
  5. Step 5: Solve for x
    x = 14,373,476,793.08/129,050.85
  6. Step 6: Final answer
    x = 111,378.40

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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.