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Finding the Fourth Proportional to 125,640.56, 173,393.88 and 71,942.48

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Solution

The fourth proportional to 125,640.56, 173,393.88 and 71,942.48 is: 99,286.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,640.56 : 173,393.88 = 71,942.48 : x
  2. Step 2: Convert to fraction form
    125,640.56/173,393.88 = 71,942.48/x
  3. Step 3: Cross multiply
    125,640.56x = 173,393.88 × 71,942.48
  4. Step 4: Simplify right side
    125,640.56x = 12,474,385,744.02
  5. Step 5: Solve for x
    x = 12,474,385,744.02/125,640.56
  6. Step 6: Final answer
    x = 99,286.30

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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.