Finding the Fourth Proportional to 77.88, 107.28 and 58.44
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Solution
The fourth proportional to 77.88, 107.28 and 58.44 is: 80.50
Step by Step Solution
- Step 1: Write the proportion equation
77.88 : 107.28 = 58.44 : x - Step 2: Convert to fraction form
77.88/107.28 = 58.44/x - Step 3: Cross multiply
77.88x = 107.28 × 58.44 - Step 4: Simplify right side
77.88x = 6,269.44 - Step 5: Solve for x
x = 6,269.44/77.88 - Step 6: Final answer
x = 80.50
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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.