Home / 142,375.13-196,481.78-78,717.03

Finding the Fourth Proportional to 142,375.13, 196,481.78 and 78,717.03

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Solution

The fourth proportional to 142,375.13, 196,481.78 and 78,717.03 is: 108,631.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,375.13 : 196,481.78 = 78,717.03 : x
  2. Step 2: Convert to fraction form
    142,375.13/196,481.78 = 78,717.03/x
  3. Step 3: Cross multiply
    142,375.13x = 196,481.78 × 78,717.03
  4. Step 4: Simplify right side
    142,375.13x = 15,466,461,777.13
  5. Step 5: Solve for x
    x = 15,466,461,777.13/142,375.13
  6. Step 6: Final answer
    x = 108,631.77

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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.