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Finding the Fourth Proportional to 131.90, 197.89 and 97.94

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Solution

The fourth proportional to 131.90, 197.89 and 97.94 is: 146.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.90 : 197.89 = 97.94 : x
  2. Step 2: Convert to fraction form
    131.90/197.89 = 97.94/x
  3. Step 3: Cross multiply
    131.90x = 197.89 × 97.94
  4. Step 4: Simplify right side
    131.90x = 19,381.60
  5. Step 5: Solve for x
    x = 19,381.60/131.90
  6. Step 6: Final answer
    x = 146.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.