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Finding the Fourth Proportional to 183.69, 253.41 and 121.59

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Solution

The fourth proportional to 183.69, 253.41 and 121.59 is: 167.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.69 : 253.41 = 121.59 : x
  2. Step 2: Convert to fraction form
    183.69/253.41 = 121.59/x
  3. Step 3: Cross multiply
    183.69x = 253.41 × 121.59
  4. Step 4: Simplify right side
    183.69x = 30,812.12
  5. Step 5: Solve for x
    x = 30,812.12/183.69
  6. Step 6: Final answer
    x = 167.74

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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.