Finding the Fourth Proportional to 126.24, 189.63 and 87.99
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Solution
The fourth proportional to 126.24, 189.63 and 87.99 is: 132.17
Step by Step Solution
- Step 1: Write the proportion equation
126.24 : 189.63 = 87.99 : x - Step 2: Convert to fraction form
126.24/189.63 = 87.99/x - Step 3: Cross multiply
126.24x = 189.63 × 87.99 - Step 4: Simplify right side
126.24x = 16,685.54 - Step 5: Solve for x
x = 16,685.54/126.24 - Step 6: Final answer
x = 132.17
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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.