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Finding the Fourth Proportional to 84.58, 116.71 and 75.33

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Solution

The fourth proportional to 84.58, 116.71 and 75.33 is: 103.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.58 : 116.71 = 75.33 : x
  2. Step 2: Convert to fraction form
    84.58/116.71 = 75.33/x
  3. Step 3: Cross multiply
    84.58x = 116.71 × 75.33
  4. Step 4: Simplify right side
    84.58x = 8,791.58
  5. Step 5: Solve for x
    x = 8,791.58/84.58
  6. Step 6: Final answer
    x = 103.95

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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.