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Finding the Fourth Proportional to 149.91, 207.84 and 141.72

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Solution

The fourth proportional to 149.91, 207.84 and 141.72 is: 196.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.91 : 207.84 = 141.72 : x
  2. Step 2: Convert to fraction form
    149.91/207.84 = 141.72/x
  3. Step 3: Cross multiply
    149.91x = 207.84 × 141.72
  4. Step 4: Simplify right side
    149.91x = 29,455.08
  5. Step 5: Solve for x
    x = 29,455.08/149.91
  6. Step 6: Final answer
    x = 196.49

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.