Finding the Fourth Proportional to 163.88, 225.60 and 121.80
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Solution
The fourth proportional to 163.88, 225.60 and 121.80 is: 167.67
Step by Step Solution
- Step 1: Write the proportion equation
163.88 : 225.60 = 121.80 : x - Step 2: Convert to fraction form
163.88/225.60 = 121.80/x - Step 3: Cross multiply
163.88x = 225.60 × 121.80 - Step 4: Simplify right side
163.88x = 27,478.08 - Step 5: Solve for x
x = 27,478.08/163.88 - Step 6: Final answer
x = 167.67
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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.