Finding the Fourth Proportional to 85,536,040.40, 128,304,060.60 and 76,876,686.80
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Solution
The fourth proportional to 85,536,040.40, 128,304,060.60 and 76,876,686.80 is: 115,315,030.20
Step by Step Solution
- Step 1: Write the proportion equation
85,536,040.40 : 128,304,060.60 = 76,876,686.80 : x - Step 2: Convert to fraction form
85,536,040.40/128,304,060.60 = 76,876,686.80/x - Step 3: Cross multiply
85,536,040.40x = 128,304,060.60 × 76,876,686.80 - Step 4: Simplify right side
85,536,040.40x = 9,863,591,081,914,420 - Step 5: Solve for x
x = 9,863,591,081,914,420/85,536,040.40 - Step 6: Final answer
x = 115,315,030.20
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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.