Finding the Fourth Proportional to 81,422,743.80, 122,134,115.70 and 43,158,991.80
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Solution
The fourth proportional to 81,422,743.80, 122,134,115.70 and 43,158,991.80 is: 64,738,487.70
Step by Step Solution
- Step 1: Write the proportion equation
81,422,743.80 : 122,134,115.70 = 43,158,991.80 : x - Step 2: Convert to fraction form
81,422,743.80/122,134,115.70 = 43,158,991.80/x - Step 3: Cross multiply
81,422,743.80x = 122,134,115.70 × 43,158,991.80 - Step 4: Simplify right side
81,422,743.80x = 5,271,185,297,996,551 - Step 5: Solve for x
x = 5,271,185,297,996,551/81,422,743.80 - Step 6: Final answer
x = 64,738,487.70
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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.