Home / 139,738.23-192,813.36-79,311.42

Finding the Fourth Proportional to 139,738.23, 192,813.36 and 79,311.42

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Solution

The fourth proportional to 139,738.23, 192,813.36 and 79,311.42 is: 109,435.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,738.23 : 192,813.36 = 79,311.42 : x
  2. Step 2: Convert to fraction form
    139,738.23/192,813.36 = 79,311.42/x
  3. Step 3: Cross multiply
    139,738.23x = 192,813.36 × 79,311.42
  4. Step 4: Simplify right side
    139,738.23x = 15,292,301,376.57
  5. Step 5: Solve for x
    x = 15,292,301,376.57/139,738.23
  6. Step 6: Final answer
    x = 109,435.34

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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.