Home / 209,121.87-313,506.45-90,704.01

Finding the Fourth Proportional to 209,121.87, 313,506.45 and 90,704.01

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Solution

The fourth proportional to 209,121.87, 313,506.45 and 90,704.01 is: 135,979.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,121.87 : 313,506.45 = 90,704.01 : x
  2. Step 2: Convert to fraction form
    209,121.87/313,506.45 = 90,704.01/x
  3. Step 3: Cross multiply
    209,121.87x = 313,506.45 × 90,704.01
  4. Step 4: Simplify right side
    209,121.87x = 28,436,292,175.86
  5. Step 5: Solve for x
    x = 28,436,292,175.86/209,121.87
  6. Step 6: Final answer
    x = 135,979.52

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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.