Finding the Fourth Proportional to 157.80, 236.62 and 84.68
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Solution
The fourth proportional to 157.80, 236.62 and 84.68 is: 126.98
Step by Step Solution
- Step 1: Write the proportion equation
157.80 : 236.62 = 84.68 : x - Step 2: Convert to fraction form
157.80/236.62 = 84.68/x - Step 3: Cross multiply
157.80x = 236.62 × 84.68 - Step 4: Simplify right side
157.80x = 20,036.98 - Step 5: Solve for x
x = 20,036.98/157.80 - Step 6: Final answer
x = 126.98
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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.