Finding the Fourth Proportional to 80.36, 119.68 and 76.85
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Solution
The fourth proportional to 80.36, 119.68 and 76.85 is: 114.45
Step by Step Solution
- Step 1: Write the proportion equation
80.36 : 119.68 = 76.85 : x - Step 2: Convert to fraction form
80.36/119.68 = 76.85/x - Step 3: Cross multiply
80.36x = 119.68 × 76.85 - Step 4: Simplify right side
80.36x = 9,197.41 - Step 5: Solve for x
x = 9,197.41/80.36 - Step 6: Final answer
x = 114.45
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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.