Finding the Fourth Proportional to 207,178,147.20, 310,767,220.80 and 139,053,475.20
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Solution
The fourth proportional to 207,178,147.20, 310,767,220.80 and 139,053,475.20 is: 208,580,212.80
Step by Step Solution
- Step 1: Write the proportion equation
207,178,147.20 : 310,767,220.80 = 139,053,475.20 : x - Step 2: Convert to fraction form
207,178,147.20/310,767,220.80 = 139,053,475.20/x - Step 3: Cross multiply
207,178,147.20x = 310,767,220.80 × 139,053,475.20 - Step 4: Simplify right side
207,178,147.20x = 43,213,262,030,485,720 - Step 5: Solve for x
x = 43,213,262,030,485,720/207,178,147.20 - Step 6: Final answer
x = 208,580,212.80
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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.