Finding the Fourth Proportional to 94.05, 140.79 and 71.31
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Solution
The fourth proportional to 94.05, 140.79 and 71.31 is: 106.75
Step by Step Solution
- Step 1: Write the proportion equation
94.05 : 140.79 = 71.31 : x - Step 2: Convert to fraction form
94.05/140.79 = 71.31/x - Step 3: Cross multiply
94.05x = 140.79 × 71.31 - Step 4: Simplify right side
94.05x = 10,039.73 - Step 5: Solve for x
x = 10,039.73/94.05 - Step 6: Final answer
x = 106.75
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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.