Finding the Fourth Proportional to 138.24, 190.08 and 124.88
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Solution
The fourth proportional to 138.24, 190.08 and 124.88 is: 171.70
Step by Step Solution
- Step 1: Write the proportion equation
138.24 : 190.08 = 124.88 : x - Step 2: Convert to fraction form
138.24/190.08 = 124.88/x - Step 3: Cross multiply
138.24x = 190.08 × 124.88 - Step 4: Simplify right side
138.24x = 23,736.24 - Step 5: Solve for x
x = 23,736.24/138.24 - Step 6: Final answer
x = 171.70
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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.