Finding the Fourth Proportional to 135.17, 186.50 and 128.99
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Solution
The fourth proportional to 135.17, 186.50 and 128.99 is: 177.98
Step by Step Solution
- Step 1: Write the proportion equation
135.17 : 186.50 = 128.99 : x - Step 2: Convert to fraction form
135.17/186.50 = 128.99/x - Step 3: Cross multiply
135.17x = 186.50 × 128.99 - Step 4: Simplify right side
135.17x = 24,057.42 - Step 5: Solve for x
x = 24,057.42/135.17 - Step 6: Final answer
x = 177.98
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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.