Home / 143,815.92-198,463.38-78,405.36

Finding the Fourth Proportional to 143,815.92, 198,463.38 and 78,405.36

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Solution

The fourth proportional to 143,815.92, 198,463.38 and 78,405.36 is: 108,197.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,815.92 : 198,463.38 = 78,405.36 : x
  2. Step 2: Convert to fraction form
    143,815.92/198,463.38 = 78,405.36/x
  3. Step 3: Cross multiply
    143,815.92x = 198,463.38 × 78,405.36
  4. Step 4: Simplify right side
    143,815.92x = 15,560,592,755.72
  5. Step 5: Solve for x
    x = 15,560,592,755.72/143,815.92
  6. Step 6: Final answer
    x = 108,197.99

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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.