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Finding the Fourth Proportional to 225,405.30, 311,059.31 and 129,918.15

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Solution

The fourth proportional to 225,405.30, 311,059.31 and 129,918.15 is: 179,287.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,405.30 : 311,059.31 = 129,918.15 : x
  2. Step 2: Convert to fraction form
    225,405.30/311,059.31 = 129,918.15/x
  3. Step 3: Cross multiply
    225,405.30x = 311,059.31 × 129,918.15
  4. Step 4: Simplify right side
    225,405.30x = 40,412,250,095.48
  5. Step 5: Solve for x
    x = 40,412,250,095.48/225,405.30
  6. Step 6: Final answer
    x = 179,287.04

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1.5x scale

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.