Finding the Fourth Proportional to 386,880,091.60, 580,320,137.40 and 128,135,246.80
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Solution
The fourth proportional to 386,880,091.60, 580,320,137.40 and 128,135,246.80 is: 192,202,870.20
Step by Step Solution
- Step 1: Write the proportion equation
386,880,091.60 : 580,320,137.40 = 128,135,246.80 : x - Step 2: Convert to fraction form
386,880,091.60/580,320,137.40 = 128,135,246.80/x - Step 3: Cross multiply
386,880,091.60x = 580,320,137.40 × 128,135,246.80 - Step 4: Simplify right side
386,880,091.60x = 74,359,464,028,758,912 - Step 5: Solve for x
x = 74,359,464,028,758,912/386,880,091.60 - Step 6: Final answer
x = 192,202,870.20
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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.