Home / 143,979.96-198,678.56-80,321.86

Finding the Fourth Proportional to 143,979.96, 198,678.56 and 80,321.86

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Solution

The fourth proportional to 143,979.96, 198,678.56 and 80,321.86 is: 110,836.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,979.96 : 198,678.56 = 80,321.86 : x
  2. Step 2: Convert to fraction form
    143,979.96/198,678.56 = 80,321.86/x
  3. Step 3: Cross multiply
    143,979.96x = 198,678.56 × 80,321.86
  4. Step 4: Simplify right side
    143,979.96x = 15,958,231,328.06
  5. Step 5: Solve for x
    x = 15,958,231,328.06/143,979.96
  6. Step 6: Final answer
    x = 110,836.47

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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.