Finding the Fourth Proportional to 135.36, 202.84 and 81.32
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Solution
The fourth proportional to 135.36, 202.84 and 81.32 is: 121.86
Step by Step Solution
- Step 1: Write the proportion equation
135.36 : 202.84 = 81.32 : x - Step 2: Convert to fraction form
135.36/202.84 = 81.32/x - Step 3: Cross multiply
135.36x = 202.84 × 81.32 - Step 4: Simplify right side
135.36x = 16,494.95 - Step 5: Solve for x
x = 16,494.95/135.36 - Step 6: Final answer
x = 121.86
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.