Home / 209,198.69-313,621.70-90,780.84

Finding the Fourth Proportional to 209,198.69, 313,621.70 and 90,780.84

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Solution

The fourth proportional to 209,198.69, 313,621.70 and 90,780.84 is: 136,094.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,198.69 : 313,621.70 = 90,780.84 : x
  2. Step 2: Convert to fraction form
    209,198.69/313,621.70 = 90,780.84/x
  3. Step 3: Cross multiply
    209,198.69x = 313,621.70 × 90,780.84
  4. Step 4: Simplify right side
    209,198.69x = 28,470,840,914.32
  5. Step 5: Solve for x
    x = 28,470,840,914.32/209,198.69
  6. Step 6: Final answer
    x = 136,094.74

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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.