Home / 209,115.21-313,496.50-90,697.40

Finding the Fourth Proportional to 209,115.21, 313,496.50 and 90,697.40

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Solution

The fourth proportional to 209,115.21, 313,496.50 and 90,697.40 is: 135,969.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,115.21 : 313,496.50 = 90,697.40 : x
  2. Step 2: Convert to fraction form
    209,115.21/313,496.50 = 90,697.40/x
  3. Step 3: Cross multiply
    209,115.21x = 313,496.50 × 90,697.40
  4. Step 4: Simplify right side
    209,115.21x = 28,433,317,459.10
  5. Step 5: Solve for x
    x = 28,433,317,459.10/209,115.21
  6. Step 6: Final answer
    x = 135,969.63

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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.