Finding the Fourth Proportional to 71.60, 107.28 and 50.72
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Solution
The fourth proportional to 71.60, 107.28 and 50.72 is: 75.99
Step by Step Solution
- Step 1: Write the proportion equation
71.60 : 107.28 = 50.72 : x - Step 2: Convert to fraction form
71.60/107.28 = 50.72/x - Step 3: Cross multiply
71.60x = 107.28 × 50.72 - Step 4: Simplify right side
71.60x = 5,441.24 - Step 5: Solve for x
x = 5,441.24/71.60 - Step 6: Final answer
x = 75.99
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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.