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Finding the Fourth Proportional to 177.69, 245.25 and 122.51

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Solution

The fourth proportional to 177.69, 245.25 and 122.51 is: 169.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.69 : 245.25 = 122.51 : x
  2. Step 2: Convert to fraction form
    177.69/245.25 = 122.51/x
  3. Step 3: Cross multiply
    177.69x = 245.25 × 122.51
  4. Step 4: Simplify right side
    177.69x = 30,045.58
  5. Step 5: Solve for x
    x = 30,045.58/177.69
  6. Step 6: Final answer
    x = 169.09

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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.