Finding the Fourth Proportional to 98.11, 135.26 and 81.53
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Solution
The fourth proportional to 98.11, 135.26 and 81.53 is: 112.40
Step by Step Solution
- Step 1: Write the proportion equation
98.11 : 135.26 = 81.53 : x - Step 2: Convert to fraction form
98.11/135.26 = 81.53/x - Step 3: Cross multiply
98.11x = 135.26 × 81.53 - Step 4: Simplify right side
98.11x = 11,026.97 - Step 5: Solve for x
x = 11,026.97/98.11 - Step 6: Final answer
x = 112.40
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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.