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Finding the Fourth Proportional to 225,720.76, 311,487.90 and 123,742.73

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Solution

The fourth proportional to 225,720.76, 311,487.90 and 123,742.73 is: 170,761.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,720.76 : 311,487.90 = 123,742.73 : x
  2. Step 2: Convert to fraction form
    225,720.76/311,487.90 = 123,742.73/x
  3. Step 3: Cross multiply
    225,720.76x = 311,487.90 × 123,742.73
  4. Step 4: Simplify right side
    225,720.76x = 38,544,363,107.97
  5. Step 5: Solve for x
    x = 38,544,363,107.97/225,720.76
  6. Step 6: Final answer
    x = 170,761.27

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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.