Finding the Fourth Proportional to 117.36, 161.99 and 80.62
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Solution
The fourth proportional to 117.36, 161.99 and 80.62 is: 111.28
Step by Step Solution
- Step 1: Write the proportion equation
117.36 : 161.99 = 80.62 : x - Step 2: Convert to fraction form
117.36/161.99 = 80.62/x - Step 3: Cross multiply
117.36x = 161.99 × 80.62 - Step 4: Simplify right side
117.36x = 13,059.63 - Step 5: Solve for x
x = 13,059.63/117.36 - Step 6: Final answer
x = 111.28
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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.