Finding the Fourth Proportional to 75.50, 104.20 and 42.75
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Solution
The fourth proportional to 75.50, 104.20 and 42.75 is: 58.99
Step by Step Solution
- Step 1: Write the proportion equation
75.50 : 104.20 = 42.75 : x - Step 2: Convert to fraction form
75.50/104.20 = 42.75/x - Step 3: Cross multiply
75.50x = 104.20 × 42.75 - Step 4: Simplify right side
75.50x = 4,453.82 - Step 5: Solve for x
x = 4,453.82/75.50 - Step 6: Final answer
x = 58.99
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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.