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Finding the Fourth Proportional to 121.14, 182.57 and 114.53

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Solution

The fourth proportional to 121.14, 182.57 and 114.53 is: 172.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.14 : 182.57 = 114.53 : x
  2. Step 2: Convert to fraction form
    121.14/182.57 = 114.53/x
  3. Step 3: Cross multiply
    121.14x = 182.57 × 114.53
  4. Step 4: Simplify right side
    121.14x = 20,908.26
  5. Step 5: Solve for x
    x = 20,908.26/121.14
  6. Step 6: Final answer
    x = 172.60

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.