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Finding the Fourth Proportional to 225,828.69, 311,642.96 and 129,062.57

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Solution

The fourth proportional to 225,828.69, 311,642.96 and 129,062.57 is: 178,105.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,828.69 : 311,642.96 = 129,062.57 : x
  2. Step 2: Convert to fraction form
    225,828.69/311,642.96 = 129,062.57/x
  3. Step 3: Cross multiply
    225,828.69x = 311,642.96 × 129,062.57
  4. Step 4: Simplify right side
    225,828.69x = 40,221,441,615.45
  5. Step 5: Solve for x
    x = 40,221,441,615.45/225,828.69
  6. Step 6: Final answer
    x = 178,105.99

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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.