Finding the Fourth Proportional to 102,121.20, 153,306.60 and 57,778.80
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Solution
The fourth proportional to 102,121.20, 153,306.60 and 57,778.80 is: 86,738.81
Step by Step Solution
- Step 1: Write the proportion equation
102,121.20 : 153,306.60 = 57,778.80 : x - Step 2: Convert to fraction form
102,121.20/153,306.60 = 57,778.80/x - Step 3: Cross multiply
102,121.20x = 153,306.60 × 57,778.80 - Step 4: Simplify right side
102,121.20x = 8,857,871,380.08 - Step 5: Solve for x
x = 8,857,871,380.08/102,121.20 - Step 6: Final answer
x = 86,738.81
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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.