Finding the Fourth Proportional to 75.88, 104.74 and 68.09
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Solution
The fourth proportional to 75.88, 104.74 and 68.09 is: 93.99
Step by Step Solution
- Step 1: Write the proportion equation
75.88 : 104.74 = 68.09 : x - Step 2: Convert to fraction form
75.88/104.74 = 68.09/x - Step 3: Cross multiply
75.88x = 104.74 × 68.09 - Step 4: Simplify right side
75.88x = 7,131.84 - Step 5: Solve for x
x = 7,131.84/75.88 - Step 6: Final answer
x = 93.99
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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.