Finding the Fourth Proportional to 80.26, 119.69 and 74.18
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Solution
The fourth proportional to 80.26, 119.69 and 74.18 is: 110.63
Step by Step Solution
- Step 1: Write the proportion equation
80.26 : 119.69 = 74.18 : x - Step 2: Convert to fraction form
80.26/119.69 = 74.18/x - Step 3: Cross multiply
80.26x = 119.69 × 74.18 - Step 4: Simplify right side
80.26x = 8,879.23 - Step 5: Solve for x
x = 8,879.23/80.26 - Step 6: Final answer
x = 110.63
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.