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Finding the Fourth Proportional to 71,391.70, 107,087.55 and 43,743.70

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Solution

The fourth proportional to 71,391.70, 107,087.55 and 43,743.70 is: 65,615.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,391.70 : 107,087.55 = 43,743.70 : x
  2. Step 2: Convert to fraction form
    71,391.70/107,087.55 = 43,743.70/x
  3. Step 3: Cross multiply
    71,391.70x = 107,087.55 × 43,743.70
  4. Step 4: Simplify right side
    71,391.70x = 4,684,405,660.94
  5. Step 5: Solve for x
    x = 4,684,405,660.94/71,391.70
  6. Step 6: Final answer
    x = 65,615.55

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.