Finding the Fourth Proportional to 80,745.40, 121,190.10 and 47,423.80
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Solution
The fourth proportional to 80,745.40, 121,190.10 and 47,423.80 is: 71,177.99
Step by Step Solution
- Step 1: Write the proportion equation
80,745.40 : 121,190.10 = 47,423.80 : x - Step 2: Convert to fraction form
80,745.40/121,190.10 = 47,423.80/x - Step 3: Cross multiply
80,745.40x = 121,190.10 × 47,423.80 - Step 4: Simplify right side
80,745.40x = 5,747,295,064.38 - Step 5: Solve for x
x = 5,747,295,064.38/80,745.40 - Step 6: Final answer
x = 71,177.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.