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Finding the Fourth Proportional to 225,057.20, 310,617.13 and 129,619.15

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Solution

The fourth proportional to 225,057.20, 310,617.13 and 129,619.15 is: 178,896.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,057.20 : 310,617.13 = 129,619.15 : x
  2. Step 2: Convert to fraction form
    225,057.20/310,617.13 = 129,619.15/x
  3. Step 3: Cross multiply
    225,057.20x = 310,617.13 × 129,619.15
  4. Step 4: Simplify right side
    225,057.20x = 40,261,928,366.04
  5. Step 5: Solve for x
    x = 40,261,928,366.04/225,057.20
  6. Step 6: Final answer
    x = 178,896.42

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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.