Home / 139,352.20-192,292.79-78,911.21

Finding the Fourth Proportional to 139,352.20, 192,292.79 and 78,911.21

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Solution

The fourth proportional to 139,352.20, 192,292.79 and 78,911.21 is: 108,889.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,352.20 : 192,292.79 = 78,911.21 : x
  2. Step 2: Convert to fraction form
    139,352.20/192,292.79 = 78,911.21/x
  3. Step 3: Cross multiply
    139,352.20x = 192,292.79 × 78,911.21
  4. Step 4: Simplify right side
    139,352.20x = 15,174,056,819.35
  5. Step 5: Solve for x
    x = 15,174,056,819.35/139,352.20
  6. Step 6: Final answer
    x = 108,889.97

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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.