Home / 126,138.72-174,101.76-75,828

Finding the Fourth Proportional to 126,138.72, 174,101.76 and 75,828

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Solution

The fourth proportional to 126,138.72, 174,101.76 and 75,828 is: 104,660.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,138.72 : 174,101.76 = 75,828 : x
  2. Step 2: Convert to fraction form
    126,138.72/174,101.76 = 75,828/x
  3. Step 3: Cross multiply
    126,138.72x = 174,101.76 × 75,828
  4. Step 4: Simplify right side
    126,138.72x = 13,201,788,257.28
  5. Step 5: Solve for x
    x = 13,201,788,257.28/126,138.72
  6. Step 6: Final answer
    x = 104,660.87

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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.