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Finding the Fourth Proportional to 79,115.19, 118,716.66 and 32,400.87

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Solution

The fourth proportional to 79,115.19, 118,716.66 and 32,400.87 is: 48,619.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,115.19 : 118,716.66 = 32,400.87 : x
  2. Step 2: Convert to fraction form
    79,115.19/118,716.66 = 32,400.87/x
  3. Step 3: Cross multiply
    79,115.19x = 118,716.66 × 32,400.87
  4. Step 4: Simplify right side
    79,115.19x = 3,846,523,067.49
  5. Step 5: Solve for x
    x = 3,846,523,067.49/79,115.19
  6. Step 6: Final answer
    x = 48,619.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.