Finding the Fourth Proportional to 79.15, 118.72 and 27.09
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Solution
The fourth proportional to 79.15, 118.72 and 27.09 is: 40.63
Step by Step Solution
- Step 1: Write the proportion equation
79.15 : 118.72 = 27.09 : x - Step 2: Convert to fraction form
79.15/118.72 = 27.09/x - Step 3: Cross multiply
79.15x = 118.72 × 27.09 - Step 4: Simplify right side
79.15x = 3,216.12 - Step 5: Solve for x
x = 3,216.12/79.15 - Step 6: Final answer
x = 40.63
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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.