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Finding the Fourth Proportional to 140.21, 211.56 and 134.59

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Solution

The fourth proportional to 140.21, 211.56 and 134.59 is: 203.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.21 : 211.56 = 134.59 : x
  2. Step 2: Convert to fraction form
    140.21/211.56 = 134.59/x
  3. Step 3: Cross multiply
    140.21x = 211.56 × 134.59
  4. Step 4: Simplify right side
    140.21x = 28,473.33
  5. Step 5: Solve for x
    x = 28,473.33/140.21
  6. Step 6: Final answer
    x = 203.08

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.