Home / 209,115.11-313,496.32-90,697.25

Finding the Fourth Proportional to 209,115.11, 313,496.32 and 90,697.25

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Solution

The fourth proportional to 209,115.11, 313,496.32 and 90,697.25 is: 135,969.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,115.11 : 313,496.32 = 90,697.25 : x
  2. Step 2: Convert to fraction form
    209,115.11/313,496.32 = 90,697.25/x
  3. Step 3: Cross multiply
    209,115.11x = 313,496.32 × 90,697.25
  4. Step 4: Simplify right side
    209,115.11x = 28,433,254,109.12
  5. Step 5: Solve for x
    x = 28,433,254,109.12/209,115.11
  6. Step 6: Final answer
    x = 135,969.39

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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.