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Finding the Fourth Proportional to 84.88, 126.71 and 73.36

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Solution

The fourth proportional to 84.88, 126.71 and 73.36 is: 109.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.88 : 126.71 = 73.36 : x
  2. Step 2: Convert to fraction form
    84.88/126.71 = 73.36/x
  3. Step 3: Cross multiply
    84.88x = 126.71 × 73.36
  4. Step 4: Simplify right side
    84.88x = 9,295.45
  5. Step 5: Solve for x
    x = 9,295.45/84.88
  6. Step 6: Final answer
    x = 109.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.