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Finding the Fourth Proportional to 111.62, 154.14 and 97.98

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Solution

The fourth proportional to 111.62, 154.14 and 97.98 is: 135.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.62 : 154.14 = 97.98 : x
  2. Step 2: Convert to fraction form
    111.62/154.14 = 97.98/x
  3. Step 3: Cross multiply
    111.62x = 154.14 × 97.98
  4. Step 4: Simplify right side
    111.62x = 15,102.64
  5. Step 5: Solve for x
    x = 15,102.64/111.62
  6. Step 6: Final answer
    x = 135.30

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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.