Finding the Fourth Proportional to 86,315,615.40, 129,260,846.70 and 40,824,265.80
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Solution
The fourth proportional to 86,315,615.40, 129,260,846.70 and 40,824,265.80 is: 61,135,857.50
Step by Step Solution
- Step 1: Write the proportion equation
86,315,615.40 : 129,260,846.70 = 40,824,265.80 : x - Step 2: Convert to fraction form
86,315,615.40/129,260,846.70 = 40,824,265.80/x - Step 3: Cross multiply
86,315,615.40x = 129,260,846.70 × 40,824,265.80 - Step 4: Simplify right side
86,315,615.40x = 5,276,979,163,213,853 - Step 5: Solve for x
x = 5,276,979,163,213,853/86,315,615.40 - Step 6: Final answer
x = 61,135,857.50
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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.