Home / 209,122.11-313,506.81-90,704.25

Finding the Fourth Proportional to 209,122.11, 313,506.81 and 90,704.25

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Solution

The fourth proportional to 209,122.11, 313,506.81 and 90,704.25 is: 135,979.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,122.11 : 313,506.81 = 90,704.25 : x
  2. Step 2: Convert to fraction form
    209,122.11/313,506.81 = 90,704.25/x
  3. Step 3: Cross multiply
    209,122.11x = 313,506.81 × 90,704.25
  4. Step 4: Simplify right side
    209,122.11x = 28,436,400,070.94
  5. Step 5: Solve for x
    x = 28,436,400,070.94/209,122.11
  6. Step 6: Final answer
    x = 135,979.88

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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.