Finding the Fourth Proportional to 91.19, 125.82 and 66.62
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Solution
The fourth proportional to 91.19, 125.82 and 66.62 is: 91.92
Step by Step Solution
- Step 1: Write the proportion equation
91.19 : 125.82 = 66.62 : x - Step 2: Convert to fraction form
91.19/125.82 = 66.62/x - Step 3: Cross multiply
91.19x = 125.82 × 66.62 - Step 4: Simplify right side
91.19x = 8,382.44 - Step 5: Solve for x
x = 8,382.44/91.19 - Step 6: Final answer
x = 91.92
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.