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Finding the Fourth Proportional to 145.14, 217.53 and 112.74

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Solution

The fourth proportional to 145.14, 217.53 and 112.74 is: 168.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.14 : 217.53 = 112.74 : x
  2. Step 2: Convert to fraction form
    145.14/217.53 = 112.74/x
  3. Step 3: Cross multiply
    145.14x = 217.53 × 112.74
  4. Step 4: Simplify right side
    145.14x = 24,524.33
  5. Step 5: Solve for x
    x = 24,524.33/145.14
  6. Step 6: Final answer
    x = 168.97

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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.