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Finding the Fourth Proportional to 98.10, 134.39 and 94.45

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Solution

The fourth proportional to 98.10, 134.39 and 94.45 is: 129.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.10 : 134.39 = 94.45 : x
  2. Step 2: Convert to fraction form
    98.10/134.39 = 94.45/x
  3. Step 3: Cross multiply
    98.10x = 134.39 × 94.45
  4. Step 4: Simplify right side
    98.10x = 12,693.14
  5. Step 5: Solve for x
    x = 12,693.14/98.10
  6. Step 6: Final answer
    x = 129.39

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.