Home / 206,021.07-309,161.61-87,692.22

Finding the Fourth Proportional to 206,021.07, 309,161.61 and 87,692.22

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Solution

The fourth proportional to 206,021.07, 309,161.61 and 87,692.22 is: 131,593.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,021.07 : 309,161.61 = 87,692.22 : x
  2. Step 2: Convert to fraction form
    206,021.07/309,161.61 = 87,692.22/x
  3. Step 3: Cross multiply
    206,021.07x = 309,161.61 × 87,692.22
  4. Step 4: Simplify right side
    206,021.07x = 27,111,067,919.67
  5. Step 5: Solve for x
    x = 27,111,067,919.67/206,021.07
  6. Step 6: Final answer
    x = 131,593.67

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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.