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Finding the Fourth Proportional to 143,387.66, 197,874.51 and 79,725.44

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Solution

The fourth proportional to 143,387.66, 197,874.51 and 79,725.44 is: 110,020.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,387.66 : 197,874.51 = 79,725.44 : x
  2. Step 2: Convert to fraction form
    143,387.66/197,874.51 = 79,725.44/x
  3. Step 3: Cross multiply
    143,387.66x = 197,874.51 × 79,725.44
  4. Step 4: Simplify right side
    143,387.66x = 15,775,632,374.53
  5. Step 5: Solve for x
    x = 15,775,632,374.53/143,387.66
  6. Step 6: Final answer
    x = 110,020.85

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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.