Home / 80,109.20-120,131.40-27,491.60

Finding the Fourth Proportional to 80,109.20, 120,131.40 and 27,491.60

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Solution

The fourth proportional to 80,109.20, 120,131.40 and 27,491.60 is: 41,226.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,109.20 : 120,131.40 = 27,491.60 : x
  2. Step 2: Convert to fraction form
    80,109.20/120,131.40 = 27,491.60/x
  3. Step 3: Cross multiply
    80,109.20x = 120,131.40 × 27,491.60
  4. Step 4: Simplify right side
    80,109.20x = 3,302,604,396.24
  5. Step 5: Solve for x
    x = 3,302,604,396.24/80,109.20
  6. Step 6: Final answer
    x = 41,226.28

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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.