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Finding the Fourth Proportional to 143,611.37, 198,175.84 and 79,068

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Solution

The fourth proportional to 143,611.37, 198,175.84 and 79,068 is: 109,109.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,611.37 : 198,175.84 = 79,068 : x
  2. Step 2: Convert to fraction form
    143,611.37/198,175.84 = 79,068/x
  3. Step 3: Cross multiply
    143,611.37x = 198,175.84 × 79,068
  4. Step 4: Simplify right side
    143,611.37x = 15,669,367,317.12
  5. Step 5: Solve for x
    x = 15,669,367,317.12/143,611.37
  6. Step 6: Final answer
    x = 109,109.52

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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.