Finding the Fourth Proportional to 67.61, 101.21 and 51.42
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Solution
The fourth proportional to 67.61, 101.21 and 51.42 is: 76.98
Step by Step Solution
- Step 1: Write the proportion equation
67.61 : 101.21 = 51.42 : x - Step 2: Convert to fraction form
67.61/101.21 = 51.42/x - Step 3: Cross multiply
67.61x = 101.21 × 51.42 - Step 4: Simplify right side
67.61x = 5,204.22 - Step 5: Solve for x
x = 5,204.22/67.61 - Step 6: Final answer
x = 76.98
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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.