Finding the Fourth Proportional to 91.93, 126.93 and 63.99
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Solution
The fourth proportional to 91.93, 126.93 and 63.99 is: 88.34
Step by Step Solution
- Step 1: Write the proportion equation
91.93 : 126.93 = 63.99 : x - Step 2: Convert to fraction form
91.93/126.93 = 63.99/x - Step 3: Cross multiply
91.93x = 126.93 × 63.99 - Step 4: Simplify right side
91.93x = 8,121.30 - Step 5: Solve for x
x = 8,121.30/91.93 - Step 6: Final answer
x = 88.34
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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.