Finding the Fourth Proportional to 72.54, 108.72 and 51.99
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Solution
The fourth proportional to 72.54, 108.72 and 51.99 is: 77.92
Step by Step Solution
- Step 1: Write the proportion equation
72.54 : 108.72 = 51.99 : x - Step 2: Convert to fraction form
72.54/108.72 = 51.99/x - Step 3: Cross multiply
72.54x = 108.72 × 51.99 - Step 4: Simplify right side
72.54x = 5,652.35 - Step 5: Solve for x
x = 5,652.35/72.54 - Step 6: Final answer
x = 77.92
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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.