Finding the Fourth Proportional to 87.84, 121.23 and 51.00
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Solution
The fourth proportional to 87.84, 121.23 and 51.00 is: 70.39
Step by Step Solution
- Step 1: Write the proportion equation
87.84 : 121.23 = 51.00 : x - Step 2: Convert to fraction form
87.84/121.23 = 51.00/x - Step 3: Cross multiply
87.84x = 121.23 × 51.00 - Step 4: Simplify right side
87.84x = 6,183.19 - Step 5: Solve for x
x = 6,183.19/87.84 - 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.