Finding the Fourth Proportional to 128,222,130.21, 192,330,497.99 and 31,178,335.47
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Solution
The fourth proportional to 128,222,130.21, 192,330,497.99 and 31,178,335.47 is: 46,766,847.33
Step by Step Solution
- Step 1: Write the proportion equation
128,222,130.21 : 192,330,497.99 = 31,178,335.47 : x - Step 2: Convert to fraction form
128,222,130.21/192,330,497.99 = 31,178,335.47/x - Step 3: Cross multiply
128,222,130.21x = 192,330,497.99 × 31,178,335.47 - Step 4: Simplify right side
128,222,130.21x = 5,996,544,787,288,489 - Step 5: Solve for x
x = 5,996,544,787,288,489/128,222,130.21 - Step 6: Final answer
x = 46,766,847.33
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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.