Finding the Fourth Proportional to 118.73, 163.86 and 72.09
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Solution
The fourth proportional to 118.73, 163.86 and 72.09 is: 99.49
Step by Step Solution
- Step 1: Write the proportion equation
118.73 : 163.86 = 72.09 : x - Step 2: Convert to fraction form
118.73/163.86 = 72.09/x - Step 3: Cross multiply
118.73x = 163.86 × 72.09 - Step 4: Simplify right side
118.73x = 11,812.31 - Step 5: Solve for x
x = 11,812.31/118.73 - Step 6: Final answer
x = 99.49
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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.