Finding the Fourth Proportional to 90,626,899.20, 135,940,348.80 and 81,556,972.80
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Solution
The fourth proportional to 90,626,899.20, 135,940,348.80 and 81,556,972.80 is: 122,335,459.20
Step by Step Solution
- Step 1: Write the proportion equation
90,626,899.20 : 135,940,348.80 = 81,556,972.80 : x - Step 2: Convert to fraction form
90,626,899.20/135,940,348.80 = 81,556,972.80/x - Step 3: Cross multiply
90,626,899.20x = 135,940,348.80 × 81,556,972.80 - Step 4: Simplify right side
90,626,899.20x = 11,086,883,329,504,114 - Step 5: Solve for x
x = 11,086,883,329,504,114/90,626,899.20 - Step 6: Final answer
x = 122,335,459.20
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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.