Finding the Fourth Proportional to 81,584,872.20, 122,093,873.10 and 74,782,427.40
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Solution
The fourth proportional to 81,584,872.20, 122,093,873.10 and 74,782,427.40 is: 111,913,838.37
Step by Step Solution
- Step 1: Write the proportion equation
81,584,872.20 : 122,093,873.10 = 74,782,427.40 : x - Step 2: Convert to fraction form
81,584,872.20/122,093,873.10 = 74,782,427.40/x - Step 3: Cross multiply
81,584,872.20x = 122,093,873.10 × 74,782,427.40 - Step 4: Simplify right side
81,584,872.20x = 9,130,476,201,085,564 - Step 5: Solve for x
x = 9,130,476,201,085,564/81,584,872.20 - Step 6: Final answer
x = 111,913,838.37
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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.