Finding the Fourth Proportional to 81,542,359.84, 122,313,791.36 and 20,131,525.60
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Solution
The fourth proportional to 81,542,359.84, 122,313,791.36 and 20,131,525.60 is: 30,197,350.52
Step by Step Solution
- Step 1: Write the proportion equation
81,542,359.84 : 122,313,791.36 = 20,131,525.60 : x - Step 2: Convert to fraction form
81,542,359.84/122,313,791.36 = 20,131,525.60/x - Step 3: Cross multiply
81,542,359.84x = 122,313,791.36 × 20,131,525.60 - Step 4: Simplify right side
81,542,359.84x = 2,462,363,221,996,899 - Step 5: Solve for x
x = 2,462,363,221,996,899/81,542,359.84 - Step 6: Final answer
x = 30,197,350.52
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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.