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Finding the Fourth Proportional to 144.55, 199.30 and 105.18

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Solution

The fourth proportional to 144.55, 199.30 and 105.18 is: 145.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.55 : 199.30 = 105.18 : x
  2. Step 2: Convert to fraction form
    144.55/199.30 = 105.18/x
  3. Step 3: Cross multiply
    144.55x = 199.30 × 105.18
  4. Step 4: Simplify right side
    144.55x = 20,961.85
  5. Step 5: Solve for x
    x = 20,961.85/144.55
  6. Step 6: Final answer
    x = 145.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.