Finding the Fourth Proportional to 79.12, 118.26 and 68.75
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Solution
The fourth proportional to 79.12, 118.26 and 68.75 is: 102.76
Step by Step Solution
- Step 1: Write the proportion equation
79.12 : 118.26 = 68.75 : x - Step 2: Convert to fraction form
79.12/118.26 = 68.75/x - Step 3: Cross multiply
79.12x = 118.26 × 68.75 - Step 4: Simplify right side
79.12x = 8,130.67 - Step 5: Solve for x
x = 8,130.67/79.12 - Step 6: Final answer
x = 102.76
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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.