Finding the Fourth Proportional to 100,659.55, 138,910.46 and 57,639.70
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Solution
The fourth proportional to 100,659.55, 138,910.46 and 57,639.70 is: 79,542.95
Step by Step Solution
- Step 1: Write the proportion equation
100,659.55 : 138,910.46 = 57,639.70 : x - Step 2: Convert to fraction form
100,659.55/138,910.46 = 57,639.70/x - Step 3: Cross multiply
100,659.55x = 138,910.46 × 57,639.70 - Step 4: Simplify right side
100,659.55x = 8,006,757,241.26 - Step 5: Solve for x
x = 8,006,757,241.26/100,659.55 - Step 6: Final answer
x = 79,542.95
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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.