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Finding the Fourth Proportional to 145.27, 200.49 and 108.55

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Solution

The fourth proportional to 145.27, 200.49 and 108.55 is: 149.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.27 : 200.49 = 108.55 : x
  2. Step 2: Convert to fraction form
    145.27/200.49 = 108.55/x
  3. Step 3: Cross multiply
    145.27x = 200.49 × 108.55
  4. Step 4: Simplify right side
    145.27x = 21,763.19
  5. Step 5: Solve for x
    x = 21,763.19/145.27
  6. Step 6: Final answer
    x = 149.81

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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.