Finding the Fourth Proportional to 157.74, 236.60 and 79.68
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Solution
The fourth proportional to 157.74, 236.60 and 79.68 is: 119.51
Step by Step Solution
- Step 1: Write the proportion equation
157.74 : 236.60 = 79.68 : x - Step 2: Convert to fraction form
157.74/236.60 = 79.68/x - Step 3: Cross multiply
157.74x = 236.60 × 79.68 - Step 4: Simplify right side
157.74x = 18,852.29 - Step 5: Solve for x
x = 18,852.29/157.74 - Step 6: Final answer
x = 119.51
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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.