Finding the Fourth Proportional to 91.29, 125.93 and 66.68
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Solution
The fourth proportional to 91.29, 125.93 and 66.68 is: 91.97
Step by Step Solution
- Step 1: Write the proportion equation
91.29 : 125.93 = 66.68 : x - Step 2: Convert to fraction form
91.29/125.93 = 66.68/x - Step 3: Cross multiply
91.29x = 125.93 × 66.68 - Step 4: Simplify right side
91.29x = 8,396.05 - Step 5: Solve for x
x = 8,396.05/91.29 - Step 6: Final answer
x = 91.97
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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.