Finding the Fourth Proportional to 77,274,798.40, 115,912,197.60 and 71,435,540.80
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Solution
The fourth proportional to 77,274,798.40, 115,912,197.60 and 71,435,540.80 is: 107,153,311.20
Step by Step Solution
- Step 1: Write the proportion equation
77,274,798.40 : 115,912,197.60 = 71,435,540.80 : x - Step 2: Convert to fraction form
77,274,798.40/115,912,197.60 = 71,435,540.80/x - Step 3: Cross multiply
77,274,798.40x = 115,912,197.60 × 71,435,540.80 - Step 4: Simplify right side
77,274,798.40x = 8,280,250,520,872,461 - Step 5: Solve for x
x = 8,280,250,520,872,461/77,274,798.40 - Step 6: Final answer
x = 107,153,311.20
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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.