Finding the Fourth Proportional to 157.19, 235.85 and 84.23
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Solution
The fourth proportional to 157.19, 235.85 and 84.23 is: 126.37
Step by Step Solution
- Step 1: Write the proportion equation
157.19 : 235.85 = 84.23 : x - Step 2: Convert to fraction form
157.19/235.85 = 84.23/x - Step 3: Cross multiply
157.19x = 235.85 × 84.23 - Step 4: Simplify right side
157.19x = 19,864.05 - Step 5: Solve for x
x = 19,864.05/157.19 - Step 6: Final answer
x = 126.37
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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.