Finding the Fourth Proportional to 74.21, 111.27 and 54.99
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Solution
The fourth proportional to 74.21, 111.27 and 54.99 is: 82.46
Step by Step Solution
- Step 1: Write the proportion equation
74.21 : 111.27 = 54.99 : x - Step 2: Convert to fraction form
74.21/111.27 = 54.99/x - Step 3: Cross multiply
74.21x = 111.27 × 54.99 - Step 4: Simplify right side
74.21x = 6,118.74 - Step 5: Solve for x
x = 6,118.74/74.21 - Step 6: Final answer
x = 82.46
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.