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Finding the Fourth Proportional to 125,745.78, 173,600.91 and 83,361.72

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Solution

The fourth proportional to 125,745.78, 173,600.91 and 83,361.72 is: 115,086.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,745.78 : 173,600.91 = 83,361.72 : x
  2. Step 2: Convert to fraction form
    125,745.78/173,600.91 = 83,361.72/x
  3. Step 3: Cross multiply
    125,745.78x = 173,600.91 × 83,361.72
  4. Step 4: Simplify right side
    125,745.78x = 14,471,670,451.17
  5. Step 5: Solve for x
    x = 14,471,670,451.17/125,745.78
  6. Step 6: Final answer
    x = 115,086.73

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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.