Finding the Fourth Proportional to 54.60, 81.80 and 45.99
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Solution
The fourth proportional to 54.60, 81.80 and 45.99 is: 68.90
Step by Step Solution
- Step 1: Write the proportion equation
54.60 : 81.80 = 45.99 : x - Step 2: Convert to fraction form
54.60/81.80 = 45.99/x - Step 3: Cross multiply
54.60x = 81.80 × 45.99 - Step 4: Simplify right side
54.60x = 3,761.75 - Step 5: Solve for x
x = 3,761.75/54.60 - Step 6: Final answer
x = 68.90
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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.