Finding the Fourth Proportional to 135.50, 186.99 and 77.32
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Solution
The fourth proportional to 135.50, 186.99 and 77.32 is: 106.69
Step by Step Solution
- Step 1: Write the proportion equation
135.50 : 186.99 = 77.32 : x - Step 2: Convert to fraction form
135.50/186.99 = 77.32/x - Step 3: Cross multiply
135.50x = 186.99 × 77.32 - Step 4: Simplify right side
135.50x = 14,457.13 - Step 5: Solve for x
x = 14,457.13/135.50 - Step 6: Final answer
x = 106.69
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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.