Finding the Fourth Proportional to 118.99, 163.98 and 86.19
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Solution
The fourth proportional to 118.99, 163.98 and 86.19 is: 118.78
Step by Step Solution
- Step 1: Write the proportion equation
118.99 : 163.98 = 86.19 : x - Step 2: Convert to fraction form
118.99/163.98 = 86.19/x - Step 3: Cross multiply
118.99x = 163.98 × 86.19 - Step 4: Simplify right side
118.99x = 14,133.44 - Step 5: Solve for x
x = 14,133.44/118.99 - Step 6: Final answer
x = 118.78
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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.