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Finding the Fourth Proportional to 140.58, 211.22 and 89.24

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Solution

The fourth proportional to 140.58, 211.22 and 89.24 is: 134.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.58 : 211.22 = 89.24 : x
  2. Step 2: Convert to fraction form
    140.58/211.22 = 89.24/x
  3. Step 3: Cross multiply
    140.58x = 211.22 × 89.24
  4. Step 4: Simplify right side
    140.58x = 18,850.02
  5. Step 5: Solve for x
    x = 18,850.02/140.58
  6. Step 6: Final answer
    x = 134.09

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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.