Home / 142,375.22-196,481.90-78,717.12

Finding the Fourth Proportional to 142,375.22, 196,481.90 and 78,717.12

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Solution

The fourth proportional to 142,375.22, 196,481.90 and 78,717.12 is: 108,631.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,375.22 : 196,481.90 = 78,717.12 : x
  2. Step 2: Convert to fraction form
    142,375.22/196,481.90 = 78,717.12/x
  3. Step 3: Cross multiply
    142,375.22x = 196,481.90 × 78,717.12
  4. Step 4: Simplify right side
    142,375.22x = 15,466,488,760.11
  5. Step 5: Solve for x
    x = 15,466,488,760.11/142,375.22
  6. Step 6: Final answer
    x = 108,631.89

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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.