Finding the Fourth Proportional to 139,170,949.74, 192,472,087.41 and 121,737,031.38
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Solution
The fourth proportional to 139,170,949.74, 192,472,087.41 and 121,737,031.38 is: 168,361,145.69
Step by Step Solution
- Step 1: Write the proportion equation
139,170,949.74 : 192,472,087.41 = 121,737,031.38 : x - Step 2: Convert to fraction form
139,170,949.74/192,472,087.41 = 121,737,031.38/x - Step 3: Cross multiply
139,170,949.74x = 192,472,087.41 × 121,737,031.38 - Step 4: Simplify right side
139,170,949.74x = 23,430,980,544,805,272 - Step 5: Solve for x
x = 23,430,980,544,805,272/139,170,949.74 - Step 6: Final answer
x = 168,361,145.69
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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.