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Finding the Fourth Proportional to 140.02, 208.96 and 122.02

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Solution

The fourth proportional to 140.02, 208.96 and 122.02 is: 182.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.02 : 208.96 = 122.02 : x
  2. Step 2: Convert to fraction form
    140.02/208.96 = 122.02/x
  3. Step 3: Cross multiply
    140.02x = 208.96 × 122.02
  4. Step 4: Simplify right side
    140.02x = 25,497.30
  5. Step 5: Solve for x
    x = 25,497.30/140.02
  6. Step 6: Final answer
    x = 182.10

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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.