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Finding the Fourth Proportional to 135.30, 203.15 and 104.90

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Solution

The fourth proportional to 135.30, 203.15 and 104.90 is: 157.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.30 : 203.15 = 104.90 : x
  2. Step 2: Convert to fraction form
    135.30/203.15 = 104.90/x
  3. Step 3: Cross multiply
    135.30x = 203.15 × 104.90
  4. Step 4: Simplify right side
    135.30x = 21,310.44
  5. Step 5: Solve for x
    x = 21,310.44/135.30
  6. Step 6: Final answer
    x = 157.51

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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.