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Finding the Fourth Proportional to 139,843.92, 209,599.32 and 80,556.84

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Solution

The fourth proportional to 139,843.92, 209,599.32 and 80,556.84 is: 120,739.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,843.92 : 209,599.32 = 80,556.84 : x
  2. Step 2: Convert to fraction form
    139,843.92/209,599.32 = 80,556.84/x
  3. Step 3: Cross multiply
    139,843.92x = 209,599.32 × 80,556.84
  4. Step 4: Simplify right side
    139,843.92x = 16,884,658,885.35
  5. Step 5: Solve for x
    x = 16,884,658,885.35/139,843.92
  6. Step 6: Final answer
    x = 120,739.31

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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.