Home / 139,538.28-192,558.80-79,114.56

Finding the Fourth Proportional to 139,538.28, 192,558.80 and 79,114.56

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Solution

The fourth proportional to 139,538.28, 192,558.80 and 79,114.56 is: 109,175.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,538.28 : 192,558.80 = 79,114.56 : x
  2. Step 2: Convert to fraction form
    139,538.28/192,558.80 = 79,114.56/x
  3. Step 3: Cross multiply
    139,538.28x = 192,558.80 × 79,114.56
  4. Step 4: Simplify right side
    139,538.28x = 15,234,204,736.13
  5. Step 5: Solve for x
    x = 15,234,204,736.13/139,538.28
  6. Step 6: Final answer
    x = 109,175.81

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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.