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Finding the Fourth Proportional to 225,542.76, 311,172.37 and 128,677.03

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Solution

The fourth proportional to 225,542.76, 311,172.37 and 128,677.03 is: 177,530.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,542.76 : 311,172.37 = 128,677.03 : x
  2. Step 2: Convert to fraction form
    225,542.76/311,172.37 = 128,677.03/x
  3. Step 3: Cross multiply
    225,542.76x = 311,172.37 × 128,677.03
  4. Step 4: Simplify right side
    225,542.76x = 40,040,734,833.80
  5. Step 5: Solve for x
    x = 40,040,734,833.80/225,542.76
  6. Step 6: Final answer
    x = 177,530.57

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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.