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Finding the Fourth Proportional to 225,955.01, 311,829.21 and 129,163.85

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Solution

The fourth proportional to 225,955.01, 311,829.21 and 129,163.85 is: 178,252.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,955.01 : 311,829.21 = 129,163.85 : x
  2. Step 2: Convert to fraction form
    225,955.01/311,829.21 = 129,163.85/x
  3. Step 3: Cross multiply
    225,955.01x = 311,829.21 × 129,163.85
  4. Step 4: Simplify right side
    225,955.01x = 40,277,059,746.91
  5. Step 5: Solve for x
    x = 40,277,059,746.91/225,955.01
  6. Step 6: Final answer
    x = 178,252.57

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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.