Home / 99,814.20-149,721.30-80,131.20

Finding the Fourth Proportional to 99,814.20, 149,721.30 and 80,131.20

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Solution

The fourth proportional to 99,814.20, 149,721.30 and 80,131.20 is: 120,196.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,814.20 : 149,721.30 = 80,131.20 : x
  2. Step 2: Convert to fraction form
    99,814.20/149,721.30 = 80,131.20/x
  3. Step 3: Cross multiply
    99,814.20x = 149,721.30 × 80,131.20
  4. Step 4: Simplify right side
    99,814.20x = 11,997,347,434.56
  5. Step 5: Solve for x
    x = 11,997,347,434.56/99,814.20
  6. Step 6: Final answer
    x = 120,196.80

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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.