Finding the Fourth Proportional to 98.49, 135.80 and 80.94
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Solution
The fourth proportional to 98.49, 135.80 and 80.94 is: 111.60
Step by Step Solution
- Step 1: Write the proportion equation
98.49 : 135.80 = 80.94 : x - Step 2: Convert to fraction form
98.49/135.80 = 80.94/x - Step 3: Cross multiply
98.49x = 135.80 × 80.94 - Step 4: Simplify right side
98.49x = 10,991.25 - Step 5: Solve for x
x = 10,991.25/98.49 - Step 6: Final answer
x = 111.60
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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.