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Finding the Fourth Proportional to 121.63, 182.45 and 101.53

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Solution

The fourth proportional to 121.63, 182.45 and 101.53 is: 152.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.63 : 182.45 = 101.53 : x
  2. Step 2: Convert to fraction form
    121.63/182.45 = 101.53/x
  3. Step 3: Cross multiply
    121.63x = 182.45 × 101.53
  4. Step 4: Simplify right side
    121.63x = 18,524.15
  5. Step 5: Solve for x
    x = 18,524.15/121.63
  6. Step 6: Final answer
    x = 152.30

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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.