Finding the Fourth Proportional to 163.21, 225.14 and 104.18
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Solution
The fourth proportional to 163.21, 225.14 and 104.18 is: 143.70
Step by Step Solution
- Step 1: Write the proportion equation
163.21 : 225.14 = 104.18 : x - Step 2: Convert to fraction form
163.21/225.14 = 104.18/x - Step 3: Cross multiply
163.21x = 225.14 × 104.18 - Step 4: Simplify right side
163.21x = 23,454.00 - Step 5: Solve for x
x = 23,454.00/163.21 - Step 6: Final answer
x = 143.70
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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.