Finding the Fourth Proportional to 115.21, 173.48 and 84.99
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Solution
The fourth proportional to 115.21, 173.48 and 84.99 is: 127.98
Step by Step Solution
- Step 1: Write the proportion equation
115.21 : 173.48 = 84.99 : x - Step 2: Convert to fraction form
115.21/173.48 = 84.99/x - Step 3: Cross multiply
115.21x = 173.48 × 84.99 - Step 4: Simplify right side
115.21x = 14,744.07 - Step 5: Solve for x
x = 14,744.07/115.21 - Step 6: Final answer
x = 127.98
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.