Home / 139,039.26-191,873.14-78,609.75

Finding the Fourth Proportional to 139,039.26, 191,873.14 and 78,609.75

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Solution

The fourth proportional to 139,039.26, 191,873.14 and 78,609.75 is: 108,480.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,039.26 : 191,873.14 = 78,609.75 : x
  2. Step 2: Convert to fraction form
    139,039.26/191,873.14 = 78,609.75/x
  3. Step 3: Cross multiply
    139,039.26x = 191,873.14 × 78,609.75
  4. Step 4: Simplify right side
    139,039.26x = 15,083,099,567.12
  5. Step 5: Solve for x
    x = 15,083,099,567.12/139,039.26
  6. Step 6: Final answer
    x = 108,480.87

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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.