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Finding the Fourth Proportional to 225,612.43, 311,486.72 and 145,179.73

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Solution

The fourth proportional to 225,612.43, 311,486.72 and 145,179.73 is: 200,439.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,612.43 : 311,486.72 = 145,179.73 : x
  2. Step 2: Convert to fraction form
    225,612.43/311,486.72 = 145,179.73/x
  3. Step 3: Cross multiply
    225,612.43x = 311,486.72 × 145,179.73
  4. Step 4: Simplify right side
    225,612.43x = 45,221,555,624.85
  5. Step 5: Solve for x
    x = 45,221,555,624.85/225,612.43
  6. Step 6: Final answer
    x = 200,439.12

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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.