Finding the Fourth Proportional to 258,649,729.04, 388,145,949.12 and 142,146,445.68
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Solution
The fourth proportional to 258,649,729.04, 388,145,949.12 and 142,146,445.68 is: 213,313,840.60
Step by Step Solution
- Step 1: Write the proportion equation
258,649,729.04 : 388,145,949.12 = 142,146,445.68 : x - Step 2: Convert to fraction form
258,649,729.04/388,145,949.12 = 142,146,445.68/x - Step 3: Cross multiply
258,649,729.04x = 388,145,949.12 × 142,146,445.68 - Step 4: Simplify right side
258,649,729.04x = 55,173,567,072,498,128 - Step 5: Solve for x
x = 55,173,567,072,498,128/258,649,729.04 - Step 6: Final answer
x = 213,313,840.60
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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.