Finding the Fourth Proportional to 87.96, 121.35 and 51.11
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Solution
The fourth proportional to 87.96, 121.35 and 51.11 is: 70.51
Step by Step Solution
- Step 1: Write the proportion equation
87.96 : 121.35 = 51.11 : x - Step 2: Convert to fraction form
87.96/121.35 = 51.11/x - Step 3: Cross multiply
87.96x = 121.35 × 51.11 - Step 4: Simplify right side
87.96x = 6,202.24 - Step 5: Solve for x
x = 6,202.24/87.96 - Step 6: Final answer
x = 70.51
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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.