Finding the Fourth Proportional to 74.79, 103.26 and 66.99
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Solution
The fourth proportional to 74.79, 103.26 and 66.99 is: 92.49
Step by Step Solution
- Step 1: Write the proportion equation
74.79 : 103.26 = 66.99 : x - Step 2: Convert to fraction form
74.79/103.26 = 66.99/x - Step 3: Cross multiply
74.79x = 103.26 × 66.99 - Step 4: Simplify right side
74.79x = 6,917.39 - Step 5: Solve for x
x = 6,917.39/74.79 - Step 6: Final answer
x = 92.49
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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.