Home / 106,815.78-159,928.38-80,440.56

Finding the Fourth Proportional to 106,815.78, 159,928.38 and 80,440.56

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Solution

The fourth proportional to 106,815.78, 159,928.38 and 80,440.56 is: 120,438.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,815.78 : 159,928.38 = 80,440.56 : x
  2. Step 2: Convert to fraction form
    106,815.78/159,928.38 = 80,440.56/x
  3. Step 3: Cross multiply
    106,815.78x = 159,928.38 × 80,440.56
  4. Step 4: Simplify right side
    106,815.78x = 12,864,728,447.09
  5. Step 5: Solve for x
    x = 12,864,728,447.09/106,815.78
  6. Step 6: Final answer
    x = 120,438.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.