Home / 209,013.76-313,421.82-80,990.02

Finding the Fourth Proportional to 209,013.76, 313,421.82 and 80,990.02

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Solution

The fourth proportional to 209,013.76, 313,421.82 and 80,990.02 is: 121,446.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,013.76 : 313,421.82 = 80,990.02 : x
  2. Step 2: Convert to fraction form
    209,013.76/313,421.82 = 80,990.02/x
  3. Step 3: Cross multiply
    209,013.76x = 313,421.82 × 80,990.02
  4. Step 4: Simplify right side
    209,013.76x = 25,384,039,470.24
  5. Step 5: Solve for x
    x = 25,384,039,470.24/209,013.76
  6. Step 6: Final answer
    x = 121,446.74

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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.