Finding the Fourth Proportional to 87.80, 121.08 and 50.96
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Solution
The fourth proportional to 87.80, 121.08 and 50.96 is: 70.28
Step by Step Solution
- Step 1: Write the proportion equation
87.80 : 121.08 = 50.96 : x - Step 2: Convert to fraction form
87.80/121.08 = 50.96/x - Step 3: Cross multiply
87.80x = 121.08 × 50.96 - Step 4: Simplify right side
87.80x = 6,170.24 - Step 5: Solve for x
x = 6,170.24/87.80 - Step 6: Final answer
x = 70.28
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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.