Finding the Fourth Proportional to 100.59, 138.82 and 75.99
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Solution
The fourth proportional to 100.59, 138.82 and 75.99 is: 104.87
Step by Step Solution
- Step 1: Write the proportion equation
100.59 : 138.82 = 75.99 : x - Step 2: Convert to fraction form
100.59/138.82 = 75.99/x - Step 3: Cross multiply
100.59x = 138.82 × 75.99 - Step 4: Simplify right side
100.59x = 10,548.93 - Step 5: Solve for x
x = 10,548.93/100.59 - Step 6: Final answer
x = 104.87
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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.