Finding the Fourth Proportional to 87.19, 120.21 and 68.96
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Solution
The fourth proportional to 87.19, 120.21 and 68.96 is: 95.08
Step by Step Solution
- Step 1: Write the proportion equation
87.19 : 120.21 = 68.96 : x - Step 2: Convert to fraction form
87.19/120.21 = 68.96/x - Step 3: Cross multiply
87.19x = 120.21 × 68.96 - Step 4: Simplify right side
87.19x = 8,289.68 - Step 5: Solve for x
x = 8,289.68/87.19 - Step 6: Final answer
x = 95.08
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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.