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Finding the Fourth Proportional to 98.14, 135.24 and 80.58

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Solution

The fourth proportional to 98.14, 135.24 and 80.58 is: 111.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.14 : 135.24 = 80.58 : x
  2. Step 2: Convert to fraction form
    98.14/135.24 = 80.58/x
  3. Step 3: Cross multiply
    98.14x = 135.24 × 80.58
  4. Step 4: Simplify right side
    98.14x = 10,897.64
  5. Step 5: Solve for x
    x = 10,897.64/98.14
  6. Step 6: Final answer
    x = 111.04

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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.