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Finding the Fourth Proportional to 175.34, 242.08 and 122.87

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Solution

The fourth proportional to 175.34, 242.08 and 122.87 is: 169.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.34 : 242.08 = 122.87 : x
  2. Step 2: Convert to fraction form
    175.34/242.08 = 122.87/x
  3. Step 3: Cross multiply
    175.34x = 242.08 × 122.87
  4. Step 4: Simplify right side
    175.34x = 29,742.54
  5. Step 5: Solve for x
    x = 29,742.54/175.34
  6. Step 6: Final answer
    x = 169.63

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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.