Finding the Fourth Proportional to 129.36, 194.08 and 126.96
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Solution
The fourth proportional to 129.36, 194.08 and 126.96 is: 190.48
Step by Step Solution
- Step 1: Write the proportion equation
129.36 : 194.08 = 126.96 : x - Step 2: Convert to fraction form
129.36/194.08 = 126.96/x - Step 3: Cross multiply
129.36x = 194.08 × 126.96 - Step 4: Simplify right side
129.36x = 24,640.40 - Step 5: Solve for x
x = 24,640.40/129.36 - Step 6: Final answer
x = 190.48
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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.