Home / 80,121.23-120,209.60-30,215.64

Finding the Fourth Proportional to 80,121.23, 120,209.60 and 30,215.64

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Solution

The fourth proportional to 80,121.23, 120,209.60 and 30,215.64 is: 45,333.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,121.23 : 120,209.60 = 30,215.64 : x
  2. Step 2: Convert to fraction form
    80,121.23/120,209.60 = 30,215.64/x
  3. Step 3: Cross multiply
    80,121.23x = 120,209.60 × 30,215.64
  4. Step 4: Simplify right side
    80,121.23x = 3,632,209,998.14
  5. Step 5: Solve for x
    x = 3,632,209,998.14/80,121.23
  6. Step 6: Final answer
    x = 45,333.93

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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.