Finding the Fourth Proportional to 56.74, 85.50 and 53.99
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Solution
The fourth proportional to 56.74, 85.50 and 53.99 is: 81.37
Step by Step Solution
- Step 1: Write the proportion equation
56.74 : 85.50 = 53.99 : x - Step 2: Convert to fraction form
56.74/85.50 = 53.99/x - Step 3: Cross multiply
56.74x = 85.50 × 53.99 - Step 4: Simplify right side
56.74x = 4,616.56 - Step 5: Solve for x
x = 4,616.56/56.74 - Step 6: Final answer
x = 81.37
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.