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Finding the Fourth Proportional to 203.95, 305.99 and 82.14

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Solution

The fourth proportional to 203.95, 305.99 and 82.14 is: 123.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.95 : 305.99 = 82.14 : x
  2. Step 2: Convert to fraction form
    203.95/305.99 = 82.14/x
  3. Step 3: Cross multiply
    203.95x = 305.99 × 82.14
  4. Step 4: Simplify right side
    203.95x = 25,133.61
  5. Step 5: Solve for x
    x = 25,133.61/203.95
  6. Step 6: Final answer
    x = 123.24

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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.