Finding the Fourth Proportional to 87.23, 120.26 and 86.08
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Solution
The fourth proportional to 87.23, 120.26 and 86.08 is: 118.67
Step by Step Solution
- Step 1: Write the proportion equation
87.23 : 120.26 = 86.08 : x - Step 2: Convert to fraction form
87.23/120.26 = 86.08/x - Step 3: Cross multiply
87.23x = 120.26 × 86.08 - Step 4: Simplify right side
87.23x = 10,351.98 - Step 5: Solve for x
x = 10,351.98/87.23 - Step 6: Final answer
x = 118.67
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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.