Finding the Fourth Proportional to 129,310,235.20, 193,965,352.80 and 115,280,192.80
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Solution
The fourth proportional to 129,310,235.20, 193,965,352.80 and 115,280,192.80 is: 172,920,289.20
Step by Step Solution
- Step 1: Write the proportion equation
129,310,235.20 : 193,965,352.80 = 115,280,192.80 : x - Step 2: Convert to fraction form
129,310,235.20/193,965,352.80 = 115,280,192.80/x - Step 3: Cross multiply
129,310,235.20x = 193,965,352.80 × 115,280,192.80 - Step 4: Simplify right side
129,310,235.20x = 22,360,363,267,304,020 - Step 5: Solve for x
x = 22,360,363,267,304,020/129,310,235.20 - Step 6: Final answer
x = 172,920,289.20
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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.