Finding the Fourth Proportional to 79.93, 119.28 and 68.99
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Solution
The fourth proportional to 79.93, 119.28 and 68.99 is: 102.96
Step by Step Solution
- Step 1: Write the proportion equation
79.93 : 119.28 = 68.99 : x - Step 2: Convert to fraction form
79.93/119.28 = 68.99/x - Step 3: Cross multiply
79.93x = 119.28 × 68.99 - Step 4: Simplify right side
79.93x = 8,228.78 - Step 5: Solve for x
x = 8,228.78/79.93 - Step 6: Final answer
x = 102.96
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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.