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Finding the Fourth Proportional to 140,419.80, 193,756.68 and 79,991.64

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Solution

The fourth proportional to 140,419.80, 193,756.68 and 79,991.64 is: 110,375.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,419.80 : 193,756.68 = 79,991.64 : x
  2. Step 2: Convert to fraction form
    140,419.80/193,756.68 = 79,991.64/x
  3. Step 3: Cross multiply
    140,419.80x = 193,756.68 × 79,991.64
  4. Step 4: Simplify right side
    140,419.80x = 15,498,914,594.16
  5. Step 5: Solve for x
    x = 15,498,914,594.16/140,419.80
  6. Step 6: Final answer
    x = 110,375.56

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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.