Finding the Fourth Proportional to 112.98, 170.09 and 87.44
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Solution
The fourth proportional to 112.98, 170.09 and 87.44 is: 131.64
Step by Step Solution
- Step 1: Write the proportion equation
112.98 : 170.09 = 87.44 : x - Step 2: Convert to fraction form
112.98/170.09 = 87.44/x - Step 3: Cross multiply
112.98x = 170.09 × 87.44 - Step 4: Simplify right side
112.98x = 14,872.66 - Step 5: Solve for x
x = 14,872.66/112.98 - Step 6: Final answer
x = 131.64
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.