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Finding the Fourth Proportional to 135.72, 202.64 and 122.97

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Solution

The fourth proportional to 135.72, 202.64 and 122.97 is: 183.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.72 : 202.64 = 122.97 : x
  2. Step 2: Convert to fraction form
    135.72/202.64 = 122.97/x
  3. Step 3: Cross multiply
    135.72x = 202.64 × 122.97
  4. Step 4: Simplify right side
    135.72x = 24,918.64
  5. Step 5: Solve for x
    x = 24,918.64/135.72
  6. Step 6: Final answer
    x = 183.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.