Finding the Fourth Proportional to 79.53, 119.43 and 71.70
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Solution
The fourth proportional to 79.53, 119.43 and 71.70 is: 107.67
Step by Step Solution
- Step 1: Write the proportion equation
79.53 : 119.43 = 71.70 : x - Step 2: Convert to fraction form
79.53/119.43 = 71.70/x - Step 3: Cross multiply
79.53x = 119.43 × 71.70 - Step 4: Simplify right side
79.53x = 8,563.13 - Step 5: Solve for x
x = 8,563.13/79.53 - Step 6: Final answer
x = 107.67
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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.