Home / 143,979.86-198,690.27-80,318.72

Finding the Fourth Proportional to 143,979.86, 198,690.27 and 80,318.72

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Solution

The fourth proportional to 143,979.86, 198,690.27 and 80,318.72 is: 110,838.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,979.86 : 198,690.27 = 80,318.72 : x
  2. Step 2: Convert to fraction form
    143,979.86/198,690.27 = 80,318.72/x
  3. Step 3: Cross multiply
    143,979.86x = 198,690.27 × 80,318.72
  4. Step 4: Simplify right side
    143,979.86x = 15,958,548,162.85
  5. Step 5: Solve for x
    x = 15,958,548,162.85/143,979.86
  6. Step 6: Final answer
    x = 110,838.75

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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.