Finding the Fourth Proportional to 258,893,163.80, 388,339,745.70 and 137,960,811.80
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Solution
The fourth proportional to 258,893,163.80, 388,339,745.70 and 137,960,811.80 is: 206,941,217.70
Step by Step Solution
- Step 1: Write the proportion equation
258,893,163.80 : 388,339,745.70 = 137,960,811.80 : x - Step 2: Convert to fraction form
258,893,163.80/388,339,745.70 = 137,960,811.80/x - Step 3: Cross multiply
258,893,163.80x = 388,339,745.70 × 137,960,811.80 - Step 4: Simplify right side
258,893,163.80x = 53,575,666,570,977,560 - Step 5: Solve for x
x = 53,575,666,570,977,560/258,893,163.80 - Step 6: Final answer
x = 206,941,217.70
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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.