Finding the Fourth Proportional to 212,181,615.21, 318,325,380.89 and 74,009,211.87
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Solution
The fourth proportional to 212,181,615.21, 318,325,380.89 and 74,009,211.87 is: 111,032,289.65
Step by Step Solution
- Step 1: Write the proportion equation
212,181,615.21 : 318,325,380.89 = 74,009,211.87 : x - Step 2: Convert to fraction form
212,181,615.21/318,325,380.89 = 74,009,211.87/x - Step 3: Cross multiply
212,181,615.21x = 318,325,380.89 × 74,009,211.87 - Step 4: Simplify right side
212,181,615.21x = 23,559,010,557,516,412 - Step 5: Solve for x
x = 23,559,010,557,516,412/212,181,615.21 - Step 6: Final answer
x = 111,032,289.65
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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.