Finding the Fourth Proportional to 118.63, 163.70 and 71.99
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Solution
The fourth proportional to 118.63, 163.70 and 71.99 is: 99.35
Step by Step Solution
- Step 1: Write the proportion equation
118.63 : 163.70 = 71.99 : x - Step 2: Convert to fraction form
118.63/163.70 = 71.99/x - Step 3: Cross multiply
118.63x = 163.70 × 71.99 - Step 4: Simplify right side
118.63x = 11,785.13 - Step 5: Solve for x
x = 11,785.13/118.63 - Step 6: Final answer
x = 99.35
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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.