Home / 80,480.38-120,718.45-38,390.22

Finding the Fourth Proportional to 80,480.38, 120,718.45 and 38,390.22

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Solution

The fourth proportional to 80,480.38, 120,718.45 and 38,390.22 is: 57,584.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,480.38 : 120,718.45 = 38,390.22 : x
  2. Step 2: Convert to fraction form
    80,480.38/120,718.45 = 38,390.22/x
  3. Step 3: Cross multiply
    80,480.38x = 120,718.45 × 38,390.22
  4. Step 4: Simplify right side
    80,480.38x = 4,634,407,853.56
  5. Step 5: Solve for x
    x = 4,634,407,853.56/80,480.38
  6. Step 6: Final answer
    x = 57,584.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.