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Finding the Fourth Proportional to 225,883.89, 311,716.85 and 129,086.63

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Solution

The fourth proportional to 225,883.89, 311,716.85 and 129,086.63 is: 178,137.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,883.89 : 311,716.85 = 129,086.63 : x
  2. Step 2: Convert to fraction form
    225,883.89/311,716.85 = 129,086.63/x
  3. Step 3: Cross multiply
    225,883.89x = 311,716.85 × 129,086.63
  4. Step 4: Simplify right side
    225,883.89x = 40,238,479,195.98
  5. Step 5: Solve for x
    x = 40,238,479,195.98/225,883.89
  6. Step 6: Final answer
    x = 178,137.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.