Finding the Fourth Proportional to 79.71, 119.70 and 79.08
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Solution
The fourth proportional to 79.71, 119.70 and 79.08 is: 118.75
Step by Step Solution
- Step 1: Write the proportion equation
79.71 : 119.70 = 79.08 : x - Step 2: Convert to fraction form
79.71/119.70 = 79.08/x - Step 3: Cross multiply
79.71x = 119.70 × 79.08 - Step 4: Simplify right side
79.71x = 9,465.88 - Step 5: Solve for x
x = 9,465.88/79.71 - Step 6: Final answer
x = 118.75
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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.