Home / 80,620.46-120,321.04-78,520.94

Finding the Fourth Proportional to 80,620.46, 120,321.04 and 78,520.94

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Solution

The fourth proportional to 80,620.46, 120,321.04 and 78,520.94 is: 117,187.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,620.46 : 120,321.04 = 78,520.94 : x
  2. Step 2: Convert to fraction form
    80,620.46/120,321.04 = 78,520.94/x
  3. Step 3: Cross multiply
    80,620.46x = 120,321.04 × 78,520.94
  4. Step 4: Simplify right side
    80,620.46x = 9,447,721,162.58
  5. Step 5: Solve for x
    x = 9,447,721,162.58/80,620.46
  6. Step 6: Final answer
    x = 117,187.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.