Finding the Fourth Proportional to 83.75, 115.68 and 80.99
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Solution
The fourth proportional to 83.75, 115.68 and 80.99 is: 111.87
Step by Step Solution
- Step 1: Write the proportion equation
83.75 : 115.68 = 80.99 : x - Step 2: Convert to fraction form
83.75/115.68 = 80.99/x - Step 3: Cross multiply
83.75x = 115.68 × 80.99 - Step 4: Simplify right side
83.75x = 9,368.92 - Step 5: Solve for x
x = 9,368.92/83.75 - Step 6: Final answer
x = 111.87
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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.