Finding the Fourth Proportional to 128,752,915.20, 193,129,372.80 and 87,938,246.40
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Solution
The fourth proportional to 128,752,915.20, 193,129,372.80 and 87,938,246.40 is: 131,907,369.60
Step by Step Solution
- Step 1: Write the proportion equation
128,752,915.20 : 193,129,372.80 = 87,938,246.40 : x - Step 2: Convert to fraction form
128,752,915.20/193,129,372.80 = 87,938,246.40/x - Step 3: Cross multiply
128,752,915.20x = 193,129,372.80 × 87,938,246.40 - Step 4: Simplify right side
128,752,915.20x = 16,983,458,372,363,860 - Step 5: Solve for x
x = 16,983,458,372,363,860/128,752,915.20 - Step 6: Final answer
x = 131,907,369.60
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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.