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Finding the Fourth Proportional to 84.46, 116.54 and 55.40

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Solution

The fourth proportional to 84.46, 116.54 and 55.40 is: 76.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.46 : 116.54 = 55.40 : x
  2. Step 2: Convert to fraction form
    84.46/116.54 = 55.40/x
  3. Step 3: Cross multiply
    84.46x = 116.54 × 55.40
  4. Step 4: Simplify right side
    84.46x = 6,456.32
  5. Step 5: Solve for x
    x = 6,456.32/84.46
  6. Step 6: Final answer
    x = 76.44

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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.