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Finding the Fourth Proportional to 121.94, 183.18 and 73.31

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Solution

The fourth proportional to 121.94, 183.18 and 73.31 is: 110.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.94 : 183.18 = 73.31 : x
  2. Step 2: Convert to fraction form
    121.94/183.18 = 73.31/x
  3. Step 3: Cross multiply
    121.94x = 183.18 × 73.31
  4. Step 4: Simplify right side
    121.94x = 13,428.93
  5. Step 5: Solve for x
    x = 13,428.93/121.94
  6. Step 6: Final answer
    x = 110.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.