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Finding the Fourth Proportional to 201,469,839.40, 302,279,408.70 and 80,388,188.20

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Solution

The fourth proportional to 201,469,839.40, 302,279,408.70 and 80,388,188.20 is: 120,612,068.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,469,839.40 : 302,279,408.70 = 80,388,188.20 : x
  2. Step 2: Convert to fraction form
    201,469,839.40/302,279,408.70 = 80,388,188.20/x
  3. Step 3: Cross multiply
    201,469,839.40x = 302,279,408.70 × 80,388,188.20
  4. Step 4: Simplify right side
    201,469,839.40x = 24,299,693,995,560,316
  5. Step 5: Solve for x
    x = 24,299,693,995,560,316/201,469,839.40
  6. Step 6: Final answer
    x = 120,612,068.13

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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.