Finding the Fourth Proportional to 87.19, 120.23 and 63.84
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Solution
The fourth proportional to 87.19, 120.23 and 63.84 is: 88.02
Step by Step Solution
- Step 1: Write the proportion equation
87.19 : 120.23 = 63.84 : x - Step 2: Convert to fraction form
87.19/120.23 = 63.84/x - Step 3: Cross multiply
87.19x = 120.23 × 63.84 - Step 4: Simplify right side
87.19x = 7,674.56 - Step 5: Solve for x
x = 7,674.56/87.19 - Step 6: Final answer
x = 88.02
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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.