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Finding the Fourth Proportional to 129.56, 194.63 and 114.66

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Solution

The fourth proportional to 129.56, 194.63 and 114.66 is: 172.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.56 : 194.63 = 114.66 : x
  2. Step 2: Convert to fraction form
    129.56/194.63 = 114.66/x
  3. Step 3: Cross multiply
    129.56x = 194.63 × 114.66
  4. Step 4: Simplify right side
    129.56x = 22,315.70
  5. Step 5: Solve for x
    x = 22,315.70/129.56
  6. Step 6: Final answer
    x = 172.25

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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.