Finding the Fourth Proportional to 87.82, 121.19 and 50.99
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Solution
The fourth proportional to 87.82, 121.19 and 50.99 is: 70.36
Step by Step Solution
- Step 1: Write the proportion equation
87.82 : 121.19 = 50.99 : x - Step 2: Convert to fraction form
87.82/121.19 = 50.99/x - Step 3: Cross multiply
87.82x = 121.19 × 50.99 - Step 4: Simplify right side
87.82x = 6,178.62 - Step 5: Solve for x
x = 6,178.62/87.82 - Step 6: Final answer
x = 70.36
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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.