Finding the Fourth Proportional to 94.87, 142.16 and 91.31
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Solution
The fourth proportional to 94.87, 142.16 and 91.31 is: 136.82
Step by Step Solution
- Step 1: Write the proportion equation
94.87 : 142.16 = 91.31 : x - Step 2: Convert to fraction form
94.87/142.16 = 91.31/x - Step 3: Cross multiply
94.87x = 142.16 × 91.31 - Step 4: Simplify right side
94.87x = 12,980.26 - Step 5: Solve for x
x = 12,980.26/94.87 - Step 6: Final answer
x = 136.82
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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.