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Finding the Fourth Proportional to 241.22, 361.71 and 87.12

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Solution

The fourth proportional to 241.22, 361.71 and 87.12 is: 130.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    241.22 : 361.71 = 87.12 : x
  2. Step 2: Convert to fraction form
    241.22/361.71 = 87.12/x
  3. Step 3: Cross multiply
    241.22x = 361.71 × 87.12
  4. Step 4: Simplify right side
    241.22x = 31,511.93
  5. Step 5: Solve for x
    x = 31,511.93/241.22
  6. Step 6: Final answer
    x = 130.64

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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.