Finding the Fourth Proportional to 142,019,905.80, 213,029,858.70 and 81,553,729.80
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Solution
The fourth proportional to 142,019,905.80, 213,029,858.70 and 81,553,729.80 is: 122,330,594.70
Step by Step Solution
- Step 1: Write the proportion equation
142,019,905.80 : 213,029,858.70 = 81,553,729.80 : x - Step 2: Convert to fraction form
142,019,905.80/213,029,858.70 = 81,553,729.80/x - Step 3: Cross multiply
142,019,905.80x = 213,029,858.70 × 81,553,729.80 - Step 4: Simplify right side
142,019,905.80x = 17,373,379,535,751,978 - Step 5: Solve for x
x = 17,373,379,535,751,978/142,019,905.80 - Step 6: Final answer
x = 122,330,594.70
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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.