Home / 139,436.96-192,399.23-78,995.12

Finding the Fourth Proportional to 139,436.96, 192,399.23 and 78,995.12

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Solution

The fourth proportional to 139,436.96, 192,399.23 and 78,995.12 is: 108,999.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,436.96 : 192,399.23 = 78,995.12 : x
  2. Step 2: Convert to fraction form
    139,436.96/192,399.23 = 78,995.12/x
  3. Step 3: Cross multiply
    139,436.96x = 192,399.23 × 78,995.12
  4. Step 4: Simplify right side
    139,436.96x = 15,198,599,497.25
  5. Step 5: Solve for x
    x = 15,198,599,497.25/139,436.96
  6. Step 6: Final answer
    x = 108,999.79

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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.