Finding the Fourth Proportional to 126.61, 173.34 and 121.99
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Solution
The fourth proportional to 126.61, 173.34 and 121.99 is: 167.02
Step by Step Solution
- Step 1: Write the proportion equation
126.61 : 173.34 = 121.99 : x - Step 2: Convert to fraction form
126.61/173.34 = 121.99/x - Step 3: Cross multiply
126.61x = 173.34 × 121.99 - Step 4: Simplify right side
126.61x = 21,145.98 - Step 5: Solve for x
x = 21,145.98/126.61 - Step 6: Final answer
x = 167.02
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.