Finding the Fourth Proportional to 87.84, 121.21 and 51.01
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Solution
The fourth proportional to 87.84, 121.21 and 51.01 is: 70.39
Step by Step Solution
- Step 1: Write the proportion equation
87.84 : 121.21 = 51.01 : x - Step 2: Convert to fraction form
87.84/121.21 = 51.01/x - Step 3: Cross multiply
87.84x = 121.21 × 51.01 - Step 4: Simplify right side
87.84x = 6,183.14 - Step 5: Solve for x
x = 6,183.14/87.84 - Step 6: Final answer
x = 70.39
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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.