Finding the Fourth Proportional to 84.02, 126.26 and 80.99
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Solution
The fourth proportional to 84.02, 126.26 and 80.99 is: 121.70
Step by Step Solution
- Step 1: Write the proportion equation
84.02 : 126.26 = 80.99 : x - Step 2: Convert to fraction form
84.02/126.26 = 80.99/x - Step 3: Cross multiply
84.02x = 126.26 × 80.99 - Step 4: Simplify right side
84.02x = 10,224.76 - Step 5: Solve for x
x = 10,224.76/84.02 - Step 6: Final answer
x = 121.70
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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.