Home / 126,749.70-174,958.61-78,388.65

Finding the Fourth Proportional to 126,749.70, 174,958.61 and 78,388.65

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Solution

The fourth proportional to 126,749.70, 174,958.61 and 78,388.65 is: 108,203.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,749.70 : 174,958.61 = 78,388.65 : x
  2. Step 2: Convert to fraction form
    126,749.70/174,958.61 = 78,388.65/x
  3. Step 3: Cross multiply
    126,749.70x = 174,958.61 × 78,388.65
  4. Step 4: Simplify right side
    126,749.70x = 13,714,769,243.78
  5. Step 5: Solve for x
    x = 13,714,769,243.78/126,749.70
  6. Step 6: Final answer
    x = 108,203.56

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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.