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Finding the Fourth Proportional to 214.12, 319.88 and 136.46

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Solution

The fourth proportional to 214.12, 319.88 and 136.46 is: 203.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.12 : 319.88 = 136.46 : x
  2. Step 2: Convert to fraction form
    214.12/319.88 = 136.46/x
  3. Step 3: Cross multiply
    214.12x = 319.88 × 136.46
  4. Step 4: Simplify right side
    214.12x = 43,650.94
  5. Step 5: Solve for x
    x = 43,650.94/214.12
  6. Step 6: Final answer
    x = 203.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.