Finding the Fourth Proportional to 81,551,147.70, 122,326,721.55 and 45,271,442.10
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Solution
The fourth proportional to 81,551,147.70, 122,326,721.55 and 45,271,442.10 is: 67,907,163.15
Step by Step Solution
- Step 1: Write the proportion equation
81,551,147.70 : 122,326,721.55 = 45,271,442.10 : x - Step 2: Convert to fraction form
81,551,147.70/122,326,721.55 = 45,271,442.10/x - Step 3: Cross multiply
81,551,147.70x = 122,326,721.55 × 45,271,442.10 - Step 4: Simplify right side
81,551,147.70x = 5,537,907,091,933,647 - Step 5: Solve for x
x = 5,537,907,091,933,647/81,551,147.70 - Step 6: Final answer
x = 67,907,163.15
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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.