Home / 139,234.26-192,141.18-78,816.36

Finding the Fourth Proportional to 139,234.26, 192,141.18 and 78,816.36

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Solution

The fourth proportional to 139,234.26, 192,141.18 and 78,816.36 is: 108,765.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,234.26 : 192,141.18 = 78,816.36 : x
  2. Step 2: Convert to fraction form
    139,234.26/192,141.18 = 78,816.36/x
  3. Step 3: Cross multiply
    139,234.26x = 192,141.18 × 78,816.36
  4. Step 4: Simplify right side
    139,234.26x = 15,143,868,413.70
  5. Step 5: Solve for x
    x = 15,143,868,413.70/139,234.26
  6. Step 6: Final answer
    x = 108,765.39

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1.5x scale

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.