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Finding the Fourth Proportional to 84.49, 116.60 and 55.44

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Solution

The fourth proportional to 84.49, 116.60 and 55.44 is: 76.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.49 : 116.60 = 55.44 : x
  2. Step 2: Convert to fraction form
    84.49/116.60 = 55.44/x
  3. Step 3: Cross multiply
    84.49x = 116.60 × 55.44
  4. Step 4: Simplify right side
    84.49x = 6,463.44
  5. Step 5: Solve for x
    x = 6,463.44/84.49
  6. Step 6: Final answer
    x = 76.50

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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.