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Finding the Fourth Proportional to 83.44, 115.05 and 61.60

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Solution

The fourth proportional to 83.44, 115.05 and 61.60 is: 84.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.44 : 115.05 = 61.60 : x
  2. Step 2: Convert to fraction form
    83.44/115.05 = 61.60/x
  3. Step 3: Cross multiply
    83.44x = 115.05 × 61.60
  4. Step 4: Simplify right side
    83.44x = 7,087.08
  5. Step 5: Solve for x
    x = 7,087.08/83.44
  6. Step 6: Final answer
    x = 84.94

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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.