Finding the Fourth Proportional to 68.64, 94.71 and 42.75
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Solution
The fourth proportional to 68.64, 94.71 and 42.75 is: 58.99
Step by Step Solution
- Step 1: Write the proportion equation
68.64 : 94.71 = 42.75 : x - Step 2: Convert to fraction form
68.64/94.71 = 42.75/x - Step 3: Cross multiply
68.64x = 94.71 × 42.75 - Step 4: Simplify right side
68.64x = 4,048.85 - Step 5: Solve for x
x = 4,048.85/68.64 - 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.