Finding the Fourth Proportional to 98.21, 135.18 and 84.38
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Solution
The fourth proportional to 98.21, 135.18 and 84.38 is: 116.14
Step by Step Solution
- Step 1: Write the proportion equation
98.21 : 135.18 = 84.38 : x - Step 2: Convert to fraction form
98.21/135.18 = 84.38/x - Step 3: Cross multiply
98.21x = 135.18 × 84.38 - Step 4: Simplify right side
98.21x = 11,405.81 - Step 5: Solve for x
x = 11,405.81/98.21 - Step 6: Final answer
x = 116.14
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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.