Finding the Fourth Proportional to 100,563.19, 138,770.35 and 55,243.08
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Solution
The fourth proportional to 100,563.19, 138,770.35 and 55,243.08 is: 76,231.69
Step by Step Solution
- Step 1: Write the proportion equation
100,563.19 : 138,770.35 = 55,243.08 : x - Step 2: Convert to fraction form
100,563.19/138,770.35 = 55,243.08/x - Step 3: Cross multiply
100,563.19x = 138,770.35 × 55,243.08 - Step 4: Simplify right side
100,563.19x = 7,666,101,408.57 - Step 5: Solve for x
x = 7,666,101,408.57/100,563.19 - Step 6: Final answer
x = 76,231.69
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1.5x scale
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.