Finding the Fourth Proportional to 163.28, 244.99 and 86.23
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Solution
The fourth proportional to 163.28, 244.99 and 86.23 is: 129.38
Step by Step Solution
- Step 1: Write the proportion equation
163.28 : 244.99 = 86.23 : x - Step 2: Convert to fraction form
163.28/244.99 = 86.23/x - Step 3: Cross multiply
163.28x = 244.99 × 86.23 - Step 4: Simplify right side
163.28x = 21,124.87 - Step 5: Solve for x
x = 21,124.87/163.28 - Step 6: Final answer
x = 129.38
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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.