Home / 209,320.80-313,981.20-120,747.30

Finding the Fourth Proportional to 209,320.80, 313,981.20 and 120,747.30

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Solution

The fourth proportional to 209,320.80, 313,981.20 and 120,747.30 is: 181,120.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,320.80 : 313,981.20 = 120,747.30 : x
  2. Step 2: Convert to fraction form
    209,320.80/313,981.20 = 120,747.30/x
  3. Step 3: Cross multiply
    209,320.80x = 313,981.20 × 120,747.30
  4. Step 4: Simplify right side
    209,320.80x = 37,912,382,150.76
  5. Step 5: Solve for x
    x = 37,912,382,150.76/209,320.80
  6. Step 6: Final answer
    x = 181,120.95

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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.