Finding the Fourth Proportional to 128,178,604.20, 192,267,908.74 and 31,133,657.92
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Solution
The fourth proportional to 128,178,604.20, 192,267,908.74 and 31,133,657.92 is: 46,700,487.47
Step by Step Solution
- Step 1: Write the proportion equation
128,178,604.20 : 192,267,908.74 = 31,133,657.92 : x - Step 2: Convert to fraction form
128,178,604.20/192,267,908.74 = 31,133,657.92/x - Step 3: Cross multiply
128,178,604.20x = 192,267,908.74 × 31,133,657.92 - Step 4: Simplify right side
128,178,604.20x = 5,986,003,299,704,939 - Step 5: Solve for x
x = 5,986,003,299,704,939/128,178,604.20 - Step 6: Final answer
x = 46,700,487.47
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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.