Finding the Fourth Proportional to 115.40, 159.24 and 73.99
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Solution
The fourth proportional to 115.40, 159.24 and 73.99 is: 102.09
Step by Step Solution
- Step 1: Write the proportion equation
115.40 : 159.24 = 73.99 : x - Step 2: Convert to fraction form
115.40/159.24 = 73.99/x - Step 3: Cross multiply
115.40x = 159.24 × 73.99 - Step 4: Simplify right side
115.40x = 11,781.37 - Step 5: Solve for x
x = 11,781.37/115.40 - Step 6: Final answer
x = 102.09
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.