Finding the Fourth Proportional to 74.25, 110.70 and 69.66
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Solution
The fourth proportional to 74.25, 110.70 and 69.66 is: 103.86
Step by Step Solution
- Step 1: Write the proportion equation
74.25 : 110.70 = 69.66 : x - Step 2: Convert to fraction form
74.25/110.70 = 69.66/x - Step 3: Cross multiply
74.25x = 110.70 × 69.66 - Step 4: Simplify right side
74.25x = 7,711.36 - Step 5: Solve for x
x = 7,711.36/74.25 - Step 6: Final answer
x = 103.86
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.