Finding the Fourth Proportional to 163.07, 243.36 and 138.68
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Solution
The fourth proportional to 163.07, 243.36 and 138.68 is: 206.96
Step by Step Solution
- Step 1: Write the proportion equation
163.07 : 243.36 = 138.68 : x - Step 2: Convert to fraction form
163.07/243.36 = 138.68/x - Step 3: Cross multiply
163.07x = 243.36 × 138.68 - Step 4: Simplify right side
163.07x = 33,747.95 - Step 5: Solve for x
x = 33,747.95/163.07 - Step 6: Final answer
x = 206.96
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.