Home / 143,481.69-198,003.78-78,954.86

Finding the Fourth Proportional to 143,481.69, 198,003.78 and 78,954.86

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Solution

The fourth proportional to 143,481.69, 198,003.78 and 78,954.86 is: 108,957.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,481.69 : 198,003.78 = 78,954.86 : x
  2. Step 2: Convert to fraction form
    143,481.69/198,003.78 = 78,954.86/x
  3. Step 3: Cross multiply
    143,481.69x = 198,003.78 × 78,954.86
  4. Step 4: Simplify right side
    143,481.69x = 15,633,359,739.35
  5. Step 5: Solve for x
    x = 15,633,359,739.35/143,481.69
  6. Step 6: Final answer
    x = 108,957.18

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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.