Finding the Fourth Proportional to 128,304,078.10, 192,456,117.15 and 115,315,047.70
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Solution
The fourth proportional to 128,304,078.10, 192,456,117.15 and 115,315,047.70 is: 172,972,571.55
Step by Step Solution
- Step 1: Write the proportion equation
128,304,078.10 : 192,456,117.15 = 115,315,047.70 : x - Step 2: Convert to fraction form
128,304,078.10/192,456,117.15 = 115,315,047.70/x - Step 3: Cross multiply
128,304,078.10x = 192,456,117.15 × 115,315,047.70 - Step 4: Simplify right side
128,304,078.10x = 22,193,086,329,309,040 - Step 5: Solve for x
x = 22,193,086,329,309,040/128,304,078.10 - Step 6: Final answer
x = 172,972,571.55
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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.