Finding the Fourth Proportional to 72,921,261.31, 100,631,115.41 and 39,430,505.96
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Solution
The fourth proportional to 72,921,261.31, 100,631,115.41 and 39,430,505.96 is: 54,413,976.45
Step by Step Solution
- Step 1: Write the proportion equation
72,921,261.31 : 100,631,115.41 = 39,430,505.96 : x - Step 2: Convert to fraction form
72,921,261.31/100,631,115.41 = 39,430,505.96/x - Step 3: Cross multiply
72,921,261.31x = 100,631,115.41 × 39,430,505.96 - Step 4: Simplify right side
72,921,261.31x = 3,967,935,795,935,453 - Step 5: Solve for x
x = 3,967,935,795,935,453/72,921,261.31 - Step 6: Final answer
x = 54,413,976.45
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.