Home / 139,336.08-192,295.65-78,917.47

Finding the Fourth Proportional to 139,336.08, 192,295.65 and 78,917.47

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Solution

The fourth proportional to 139,336.08, 192,295.65 and 78,917.47 is: 108,912.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,336.08 : 192,295.65 = 78,917.47 : x
  2. Step 2: Convert to fraction form
    139,336.08/192,295.65 = 78,917.47/x
  3. Step 3: Cross multiply
    139,336.08x = 192,295.65 × 78,917.47
  4. Step 4: Simplify right side
    139,336.08x = 15,175,486,190.01
  5. Step 5: Solve for x
    x = 15,175,486,190.01/139,336.08
  6. Step 6: Final answer
    x = 108,912.83

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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.