Home / 126,628.20-189,942.30-74,010.60

Finding the Fourth Proportional to 126,628.20, 189,942.30 and 74,010.60

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Solution

The fourth proportional to 126,628.20, 189,942.30 and 74,010.60 is: 111,015.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,628.20 : 189,942.30 = 74,010.60 : x
  2. Step 2: Convert to fraction form
    126,628.20/189,942.30 = 74,010.60/x
  3. Step 3: Cross multiply
    126,628.20x = 189,942.30 × 74,010.60
  4. Step 4: Simplify right side
    126,628.20x = 14,057,743,588.38
  5. Step 5: Solve for x
    x = 14,057,743,588.38/126,628.20
  6. Step 6: Final answer
    x = 111,015.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.