Finding the Fourth Proportional to 135.99, 187.68 and 80.74
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Solution
The fourth proportional to 135.99, 187.68 and 80.74 is: 111.43
Step by Step Solution
- Step 1: Write the proportion equation
135.99 : 187.68 = 80.74 : x - Step 2: Convert to fraction form
135.99/187.68 = 80.74/x - Step 3: Cross multiply
135.99x = 187.68 × 80.74 - Step 4: Simplify right side
135.99x = 15,153.28 - Step 5: Solve for x
x = 15,153.28/135.99 - Step 6: Final answer
x = 111.43
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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.