Finding the Fourth Proportional to 81,972,163.20, 122,958,244.80 and 21,387,889.20
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Solution
The fourth proportional to 81,972,163.20, 122,958,244.80 and 21,387,889.20 is: 32,081,833.80
Step by Step Solution
- Step 1: Write the proportion equation
81,972,163.20 : 122,958,244.80 = 21,387,889.20 : x - Step 2: Convert to fraction form
81,972,163.20/122,958,244.80 = 21,387,889.20/x - Step 3: Cross multiply
81,972,163.20x = 122,958,244.80 × 21,387,889.20 - Step 4: Simplify right side
81,972,163.20x = 2,629,817,316,008,876 - Step 5: Solve for x
x = 2,629,817,316,008,876/81,972,163.20 - Step 6: Final answer
x = 32,081,833.80
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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.