Finding the Fourth Proportional to 126.08, 189.09 and 43.80
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Solution
The fourth proportional to 126.08, 189.09 and 43.80 is: 65.69
Step by Step Solution
- Step 1: Write the proportion equation
126.08 : 189.09 = 43.80 : x - Step 2: Convert to fraction form
126.08/189.09 = 43.80/x - Step 3: Cross multiply
126.08x = 189.09 × 43.80 - Step 4: Simplify right side
126.08x = 8,282.14 - Step 5: Solve for x
x = 8,282.14/126.08 - Step 6: Final answer
x = 65.69
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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.