Finding the Fourth Proportional to 125.28, 187.68 and 84.64
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Solution
The fourth proportional to 125.28, 187.68 and 84.64 is: 126.80
Step by Step Solution
- Step 1: Write the proportion equation
125.28 : 187.68 = 84.64 : x - Step 2: Convert to fraction form
125.28/187.68 = 84.64/x - Step 3: Cross multiply
125.28x = 187.68 × 84.64 - Step 4: Simplify right side
125.28x = 15,885.24 - Step 5: Solve for x
x = 15,885.24/125.28 - Step 6: Final answer
x = 126.80
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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.