Finding the Fourth Proportional to 135.09, 202.63 and 81
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Solution
The fourth proportional to 135.09, 202.63 and 81 is: 121.50
Step by Step Solution
- Step 1: Write the proportion equation
135.09 : 202.63 = 81 : x - Step 2: Convert to fraction form
135.09/202.63 = 81/x - Step 3: Cross multiply
135.09x = 202.63 × 81 - Step 4: Simplify right side
135.09x = 16,413.03 - Step 5: Solve for x
x = 16,413.03/135.09 - Step 6: Final answer
x = 121.50
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.