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Finding the Fourth Proportional to 130.21, 194.30 and 122.41

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Solution

The fourth proportional to 130.21, 194.30 and 122.41 is: 182.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.21 : 194.30 = 122.41 : x
  2. Step 2: Convert to fraction form
    130.21/194.30 = 122.41/x
  3. Step 3: Cross multiply
    130.21x = 194.30 × 122.41
  4. Step 4: Simplify right side
    130.21x = 23,784.35
  5. Step 5: Solve for x
    x = 23,784.35/130.21
  6. Step 6: Final answer
    x = 182.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.