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Finding the Fourth Proportional to 139,596.81, 192,600.14 and 79,162.71

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Solution

The fourth proportional to 139,596.81, 192,600.14 and 79,162.71 is: 109,219.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,596.81 : 192,600.14 = 79,162.71 : x
  2. Step 2: Convert to fraction form
    139,596.81/192,600.14 = 79,162.71/x
  3. Step 3: Cross multiply
    139,596.81x = 192,600.14 × 79,162.71
  4. Step 4: Simplify right side
    139,596.81x = 15,246,749,028.78
  5. Step 5: Solve for x
    x = 15,246,749,028.78/139,596.81
  6. Step 6: Final answer
    x = 109,219.90

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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.