Finding the Fourth Proportional to 128,108,255.36, 192,220,939.20 and 69,728,478.08
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Solution
The fourth proportional to 128,108,255.36, 192,220,939.20 and 69,728,478.08 is: 104,624,588.85
Step by Step Solution
- Step 1: Write the proportion equation
128,108,255.36 : 192,220,939.20 = 69,728,478.08 : x - Step 2: Convert to fraction form
128,108,255.36/192,220,939.20 = 69,728,478.08/x - Step 3: Cross multiply
128,108,255.36x = 192,220,939.20 × 69,728,478.08 - Step 4: Simplify right side
128,108,255.36x = 13,403,273,545,524,212 - Step 5: Solve for x
x = 13,403,273,545,524,212/128,108,255.36 - Step 6: Final answer
x = 104,624,588.85
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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.