Finding the Fourth Proportional to 144,129,957.87, 198,899,533.68 and 78,050,570.09
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Solution
The fourth proportional to 144,129,957.87, 198,899,533.68 and 78,050,570.09 is: 107,709,890.60
Step by Step Solution
- Step 1: Write the proportion equation
144,129,957.87 : 198,899,533.68 = 78,050,570.09 : x - Step 2: Convert to fraction form
144,129,957.87/198,899,533.68 = 78,050,570.09/x - Step 3: Cross multiply
144,129,957.87x = 198,899,533.68 × 78,050,570.09 - Step 4: Simplify right side
144,129,957.87x = 15,524,221,994,987,838 - Step 5: Solve for x
x = 15,524,221,994,987,838/144,129,957.87 - Step 6: Final answer
x = 107,709,890.60
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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.