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Finding the Fourth Proportional to 145.05, 218.55 and 119.94

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Solution

The fourth proportional to 145.05, 218.55 and 119.94 is: 180.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.05 : 218.55 = 119.94 : x
  2. Step 2: Convert to fraction form
    145.05/218.55 = 119.94/x
  3. Step 3: Cross multiply
    145.05x = 218.55 × 119.94
  4. Step 4: Simplify right side
    145.05x = 26,211.79
  5. Step 5: Solve for x
    x = 26,211.79/145.05
  6. Step 6: Final answer
    x = 180.71

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.