Finding the Fourth Proportional to 129.74, 194.75 and 126.84
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Solution
The fourth proportional to 129.74, 194.75 and 126.84 is: 190.40
Step by Step Solution
- Step 1: Write the proportion equation
129.74 : 194.75 = 126.84 : x - Step 2: Convert to fraction form
129.74/194.75 = 126.84/x - Step 3: Cross multiply
129.74x = 194.75 × 126.84 - Step 4: Simplify right side
129.74x = 24,702.09 - Step 5: Solve for x
x = 24,702.09/129.74 - Step 6: Final answer
x = 190.40
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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.