Finding the Fourth Proportional to 87.24, 120.36 and 68.82
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Solution
The fourth proportional to 87.24, 120.36 and 68.82 is: 94.95
Step by Step Solution
- Step 1: Write the proportion equation
87.24 : 120.36 = 68.82 : x - Step 2: Convert to fraction form
87.24/120.36 = 68.82/x - Step 3: Cross multiply
87.24x = 120.36 × 68.82 - Step 4: Simplify right side
87.24x = 8,283.18 - Step 5: Solve for x
x = 8,283.18/87.24 - Step 6: Final answer
x = 94.95
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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.