Finding the Fourth Proportional to 80.19, 119.97 and 68.79
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Solution
The fourth proportional to 80.19, 119.97 and 68.79 is: 102.91
Step by Step Solution
- Step 1: Write the proportion equation
80.19 : 119.97 = 68.79 : x - Step 2: Convert to fraction form
80.19/119.97 = 68.79/x - Step 3: Cross multiply
80.19x = 119.97 × 68.79 - Step 4: Simplify right side
80.19x = 8,252.74 - Step 5: Solve for x
x = 8,252.74/80.19 - Step 6: Final answer
x = 102.91
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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.