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Finding the Fourth Proportional to 183.65, 253.53 and 121.53

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Solution

The fourth proportional to 183.65, 253.53 and 121.53 is: 167.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.65 : 253.53 = 121.53 : x
  2. Step 2: Convert to fraction form
    183.65/253.53 = 121.53/x
  3. Step 3: Cross multiply
    183.65x = 253.53 × 121.53
  4. Step 4: Simplify right side
    183.65x = 30,811.50
  5. Step 5: Solve for x
    x = 30,811.50/183.65
  6. Step 6: Final answer
    x = 167.78

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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.