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Finding the Fourth Proportional to 84.54, 116.46 and 79.32

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Solution

The fourth proportional to 84.54, 116.46 and 79.32 is: 109.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.54 : 116.46 = 79.32 : x
  2. Step 2: Convert to fraction form
    84.54/116.46 = 79.32/x
  3. Step 3: Cross multiply
    84.54x = 116.46 × 79.32
  4. Step 4: Simplify right side
    84.54x = 9,237.61
  5. Step 5: Solve for x
    x = 9,237.61/84.54
  6. Step 6: Final answer
    x = 109.27

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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.