Finding the Fourth Proportional to 122,414.20, 183,621.30 and 72,647.80
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Solution
The fourth proportional to 122,414.20, 183,621.30 and 72,647.80 is: 108,971.70
Step by Step Solution
- Step 1: Write the proportion equation
122,414.20 : 183,621.30 = 72,647.80 : x - Step 2: Convert to fraction form
122,414.20/183,621.30 = 72,647.80/x - Step 3: Cross multiply
122,414.20x = 183,621.30 × 72,647.80 - Step 4: Simplify right side
122,414.20x = 13,339,683,478.14 - Step 5: Solve for x
x = 13,339,683,478.14/122,414.20 - Step 6: Final answer
x = 108,971.70
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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.