Home / 80,256.87-120,319.60-30,308.61

Finding the Fourth Proportional to 80,256.87, 120,319.60 and 30,308.61

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Solution

The fourth proportional to 80,256.87, 120,319.60 and 30,308.61 is: 45,438.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,256.87 : 120,319.60 = 30,308.61 : x
  2. Step 2: Convert to fraction form
    80,256.87/120,319.60 = 30,308.61/x
  3. Step 3: Cross multiply
    80,256.87x = 120,319.60 × 30,308.61
  4. Step 4: Simplify right side
    80,256.87x = 3,646,719,680.21
  5. Step 5: Solve for x
    x = 3,646,719,680.21/80,256.87
  6. Step 6: Final answer
    x = 45,438.10

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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.