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Finding the Fourth Proportional to 143,992.71, 198,745.52 and 87,451.47

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Solution

The fourth proportional to 143,992.71, 198,745.52 and 87,451.47 is: 120,704.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,992.71 : 198,745.52 = 87,451.47 : x
  2. Step 2: Convert to fraction form
    143,992.71/198,745.52 = 87,451.47/x
  3. Step 3: Cross multiply
    143,992.71x = 198,745.52 × 87,451.47
  4. Step 4: Simplify right side
    143,992.71x = 17,380,587,442.66
  5. Step 5: Solve for x
    x = 17,380,587,442.66/143,992.71
  6. Step 6: Final answer
    x = 120,704.63

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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.