Finding the Fourth Proportional to 85,357,639.70, 128,036,791.74 and 20,661,340.99
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Solution
The fourth proportional to 85,357,639.70, 128,036,791.74 and 20,661,340.99 is: 30,992,091.89
Step by Step Solution
- Step 1: Write the proportion equation
85,357,639.70 : 128,036,791.74 = 20,661,340.99 : x - Step 2: Convert to fraction form
85,357,639.70/128,036,791.74 = 20,661,340.99/x - Step 3: Cross multiply
85,357,639.70x = 128,036,791.74 × 20,661,340.99 - Step 4: Simplify right side
85,357,639.70x = 2,645,411,812,765,571.50 - Step 5: Solve for x
x = 2,645,411,812,765,571.50/85,357,639.70 - Step 6: Final answer
x = 30,992,091.89
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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.