Finding the Fourth Proportional to 98.08, 135.02 and 81.68
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Solution
The fourth proportional to 98.08, 135.02 and 81.68 is: 112.44
Step by Step Solution
- Step 1: Write the proportion equation
98.08 : 135.02 = 81.68 : x - Step 2: Convert to fraction form
98.08/135.02 = 81.68/x - Step 3: Cross multiply
98.08x = 135.02 × 81.68 - Step 4: Simplify right side
98.08x = 11,027.96 - Step 5: Solve for x
x = 11,027.96/98.08 - Step 6: Final answer
x = 112.44
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.