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Finding the Fourth Proportional to 125,687.78, 173,450.26 and 68,327.21

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Solution

The fourth proportional to 125,687.78, 173,450.26 and 68,327.21 is: 94,292.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,687.78 : 173,450.26 = 68,327.21 : x
  2. Step 2: Convert to fraction form
    125,687.78/173,450.26 = 68,327.21/x
  3. Step 3: Cross multiply
    125,687.78x = 173,450.26 × 68,327.21
  4. Step 4: Simplify right side
    125,687.78x = 11,851,372,339.57
  5. Step 5: Solve for x
    x = 11,851,372,339.57/125,687.78
  6. Step 6: Final answer
    x = 94,292.16

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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.