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Finding the Fourth Proportional to 175.99, 242.70 and 120.64

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Solution

The fourth proportional to 175.99, 242.70 and 120.64 is: 166.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.99 : 242.70 = 120.64 : x
  2. Step 2: Convert to fraction form
    175.99/242.70 = 120.64/x
  3. Step 3: Cross multiply
    175.99x = 242.70 × 120.64
  4. Step 4: Simplify right side
    175.99x = 29,279.33
  5. Step 5: Solve for x
    x = 29,279.33/175.99
  6. Step 6: Final answer
    x = 166.37

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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.