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Finding the Fourth Proportional to 175.40, 241.79 and 113.21

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Solution

The fourth proportional to 175.40, 241.79 and 113.21 is: 156.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.40 : 241.79 = 113.21 : x
  2. Step 2: Convert to fraction form
    175.40/241.79 = 113.21/x
  3. Step 3: Cross multiply
    175.40x = 241.79 × 113.21
  4. Step 4: Simplify right side
    175.40x = 27,371.27
  5. Step 5: Solve for x
    x = 27,371.27/175.40
  6. Step 6: Final answer
    x = 156.06

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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.