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Finding the Fourth Proportional to 102.28, 141.36 and 98.44

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Solution

The fourth proportional to 102.28, 141.36 and 98.44 is: 136.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.28 : 141.36 = 98.44 : x
  2. Step 2: Convert to fraction form
    102.28/141.36 = 98.44/x
  3. Step 3: Cross multiply
    102.28x = 141.36 × 98.44
  4. Step 4: Simplify right side
    102.28x = 13,915.48
  5. Step 5: Solve for x
    x = 13,915.48/102.28
  6. Step 6: Final answer
    x = 136.05

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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.