Home / 80,049.12-120,121.20-35,678.40

Finding the Fourth Proportional to 80,049.12, 120,121.20 and 35,678.40

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Solution

The fourth proportional to 80,049.12, 120,121.20 and 35,678.40 is: 53,538.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,049.12 : 120,121.20 = 35,678.40 : x
  2. Step 2: Convert to fraction form
    80,049.12/120,121.20 = 35,678.40/x
  3. Step 3: Cross multiply
    80,049.12x = 120,121.20 × 35,678.40
  4. Step 4: Simplify right side
    80,049.12x = 4,285,732,222.08
  5. Step 5: Solve for x
    x = 4,285,732,222.08/80,049.12
  6. Step 6: Final answer
    x = 53,538.78

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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.