Finding the Fourth Proportional to 129.80, 195.12 and 126.96
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Solution
The fourth proportional to 129.80, 195.12 and 126.96 is: 190.85
Step by Step Solution
- Step 1: Write the proportion equation
129.80 : 195.12 = 126.96 : x - Step 2: Convert to fraction form
129.80/195.12 = 126.96/x - Step 3: Cross multiply
129.80x = 195.12 × 126.96 - Step 4: Simplify right side
129.80x = 24,772.44 - Step 5: Solve for x
x = 24,772.44/129.80 - Step 6: Final answer
x = 190.85
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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.