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Finding the Fourth Proportional to 122.49, 184.68 and 113.58

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Solution

The fourth proportional to 122.49, 184.68 and 113.58 is: 171.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.49 : 184.68 = 113.58 : x
  2. Step 2: Convert to fraction form
    122.49/184.68 = 113.58/x
  3. Step 3: Cross multiply
    122.49x = 184.68 × 113.58
  4. Step 4: Simplify right side
    122.49x = 20,975.95
  5. Step 5: Solve for x
    x = 20,975.95/122.49
  6. Step 6: Final answer
    x = 171.25

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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.