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Finding the Fourth Proportional to 126,610.95, 174,742.07 and 78,879.68

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Solution

The fourth proportional to 126,610.95, 174,742.07 and 78,879.68 is: 108,865.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,610.95 : 174,742.07 = 78,879.68 : x
  2. Step 2: Convert to fraction form
    126,610.95/174,742.07 = 78,879.68/x
  3. Step 3: Cross multiply
    126,610.95x = 174,742.07 × 78,879.68
  4. Step 4: Simplify right side
    126,610.95x = 13,783,597,296.03
  5. Step 5: Solve for x
    x = 13,783,597,296.03/126,610.95
  6. Step 6: Final answer
    x = 108,865.76

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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.