Finding the Fourth Proportional to 85,505,615.40, 128,258,423.10 and 76,846,261.80
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Solution
The fourth proportional to 85,505,615.40, 128,258,423.10 and 76,846,261.80 is: 115,269,392.70
Step by Step Solution
- Step 1: Write the proportion equation
85,505,615.40 : 128,258,423.10 = 76,846,261.80 : x - Step 2: Convert to fraction form
85,505,615.40/128,258,423.10 = 76,846,261.80/x - Step 3: Cross multiply
85,505,615.40x = 128,258,423.10 × 76,846,261.80 - Step 4: Simplify right side
85,505,615.40x = 9,856,180,359,597,766 - Step 5: Solve for x
x = 9,856,180,359,597,766/85,505,615.40 - Step 6: Final answer
x = 115,269,392.70
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1.5x scale
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.