Finding the Fourth Proportional to 74.99, 113.06 and 68.31
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Solution
The fourth proportional to 74.99, 113.06 and 68.31 is: 102.99
Step by Step Solution
- Step 1: Write the proportion equation
74.99 : 113.06 = 68.31 : x - Step 2: Convert to fraction form
74.99/113.06 = 68.31/x - Step 3: Cross multiply
74.99x = 113.06 × 68.31 - Step 4: Simplify right side
74.99x = 7,723.30 - Step 5: Solve for x
x = 7,723.30/74.99 - Step 6: Final answer
x = 102.99
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.