Finding the Fourth Proportional to 75.21, 113.24 and 68.84
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Solution
The fourth proportional to 75.21, 113.24 and 68.84 is: 103.65
Step by Step Solution
- Step 1: Write the proportion equation
75.21 : 113.24 = 68.84 : x - Step 2: Convert to fraction form
75.21/113.24 = 68.84/x - Step 3: Cross multiply
75.21x = 113.24 × 68.84 - Step 4: Simplify right side
75.21x = 7,795.44 - Step 5: Solve for x
x = 7,795.44/75.21 - Step 6: Final answer
x = 103.65
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.