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Finding the Fourth Proportional to 80,479.63, 120,720.12 and 30,546.32

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Solution

The fourth proportional to 80,479.63, 120,720.12 and 30,546.32 is: 45,819.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,479.63 : 120,720.12 = 30,546.32 : x
  2. Step 2: Convert to fraction form
    80,479.63/120,720.12 = 30,546.32/x
  3. Step 3: Cross multiply
    80,479.63x = 120,720.12 × 30,546.32
  4. Step 4: Simplify right side
    80,479.63x = 3,687,554,869.63
  5. Step 5: Solve for x
    x = 3,687,554,869.63/80,479.63
  6. Step 6: Final answer
    x = 45,819.73

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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.