Home / 139,678.26-192,760.38-79,251.48

Finding the Fourth Proportional to 139,678.26, 192,760.38 and 79,251.48

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Solution

The fourth proportional to 139,678.26, 192,760.38 and 79,251.48 is: 109,369.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,678.26 : 192,760.38 = 79,251.48 : x
  2. Step 2: Convert to fraction form
    139,678.26/192,760.38 = 79,251.48/x
  3. Step 3: Cross multiply
    139,678.26x = 192,760.38 × 79,251.48
  4. Step 4: Simplify right side
    139,678.26x = 15,276,545,400.36
  5. Step 5: Solve for x
    x = 15,276,545,400.36/139,678.26
  6. Step 6: Final answer
    x = 109,369.53

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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.