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Finding the Fourth Proportional to 225,435.32, 311,025.20 and 129,939.96

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Solution

The fourth proportional to 225,435.32, 311,025.20 and 129,939.96 is: 179,273.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,435.32 : 311,025.20 = 129,939.96 : x
  2. Step 2: Convert to fraction form
    225,435.32/311,025.20 = 129,939.96/x
  3. Step 3: Cross multiply
    225,435.32x = 311,025.20 × 129,939.96
  4. Step 4: Simplify right side
    225,435.32x = 40,414,602,046.99
  5. Step 5: Solve for x
    x = 40,414,602,046.99/225,435.32
  6. Step 6: Final answer
    x = 179,273.60

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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.