Home / 139,679.25-192,723.75-82,320.86

Finding the Fourth Proportional to 139,679.25, 192,723.75 and 82,320.86

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Solution

The fourth proportional to 139,679.25, 192,723.75 and 82,320.86 is: 113,582.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,679.25 : 192,723.75 = 82,320.86 : x
  2. Step 2: Convert to fraction form
    139,679.25/192,723.75 = 82,320.86/x
  3. Step 3: Cross multiply
    139,679.25x = 192,723.75 × 82,320.86
  4. Step 4: Simplify right side
    139,679.25x = 15,865,183,878.81
  5. Step 5: Solve for x
    x = 15,865,183,878.81/139,679.25
  6. Step 6: Final answer
    x = 113,582.97

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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.