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Finding the Fourth Proportional to 141.45, 211.87 and 97.99

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Solution

The fourth proportional to 141.45, 211.87 and 97.99 is: 146.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.45 : 211.87 = 97.99 : x
  2. Step 2: Convert to fraction form
    141.45/211.87 = 97.99/x
  3. Step 3: Cross multiply
    141.45x = 211.87 × 97.99
  4. Step 4: Simplify right side
    141.45x = 20,761.14
  5. Step 5: Solve for x
    x = 20,761.14/141.45
  6. Step 6: Final answer
    x = 146.77

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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.