Finding the Fourth Proportional to 128,542,430.88, 177,442,861.87 and 86,783,063.43
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Solution
The fourth proportional to 128,542,430.88, 177,442,861.87 and 86,783,063.43 is: 119,797,292.08
Step by Step Solution
- Step 1: Write the proportion equation
128,542,430.88 : 177,442,861.87 = 86,783,063.43 : x - Step 2: Convert to fraction form
128,542,430.88/177,442,861.87 = 86,783,063.43/x - Step 3: Cross multiply
128,542,430.88x = 177,442,861.87 × 86,783,063.43 - Step 4: Simplify right side
128,542,430.88x = 15,399,035,136,647,982 - Step 5: Solve for x
x = 15,399,035,136,647,982/128,542,430.88 - Step 6: Final answer
x = 119,797,292.08
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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.