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Finding the Fourth Proportional to 175.72, 242.62 and 120.42

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Solution

The fourth proportional to 175.72, 242.62 and 120.42 is: 166.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.72 : 242.62 = 120.42 : x
  2. Step 2: Convert to fraction form
    175.72/242.62 = 120.42/x
  3. Step 3: Cross multiply
    175.72x = 242.62 × 120.42
  4. Step 4: Simplify right side
    175.72x = 29,216.30
  5. Step 5: Solve for x
    x = 29,216.30/175.72
  6. Step 6: Final answer
    x = 166.27

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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.