Finding the Fourth Proportional to 67.09, 100.64 and 18.99
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Solution
The fourth proportional to 67.09, 100.64 and 18.99 is: 28.49
Step by Step Solution
- Step 1: Write the proportion equation
67.09 : 100.64 = 18.99 : x - Step 2: Convert to fraction form
67.09/100.64 = 18.99/x - Step 3: Cross multiply
67.09x = 100.64 × 18.99 - Step 4: Simplify right side
67.09x = 1,911.15 - Step 5: Solve for x
x = 1,911.15/67.09 - Step 6: Final answer
x = 28.49
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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.