Home / 135,879.78-203,819.40-89,121.72

Finding the Fourth Proportional to 135,879.78, 203,819.40 and 89,121.72

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Solution

The fourth proportional to 135,879.78, 203,819.40 and 89,121.72 is: 133,682.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,879.78 : 203,819.40 = 89,121.72 : x
  2. Step 2: Convert to fraction form
    135,879.78/203,819.40 = 89,121.72/x
  3. Step 3: Cross multiply
    135,879.78x = 203,819.40 × 89,121.72
  4. Step 4: Simplify right side
    135,879.78x = 18,164,735,497.37
  5. Step 5: Solve for x
    x = 18,164,735,497.37/135,879.78
  6. Step 6: Final answer
    x = 133,682.40

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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.