Finding the Fourth Proportional to 90,626,948.20, 135,940,422.30 and 81,557,021.80
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Solution
The fourth proportional to 90,626,948.20, 135,940,422.30 and 81,557,021.80 is: 122,335,532.70
Step by Step Solution
- Step 1: Write the proportion equation
90,626,948.20 : 135,940,422.30 = 81,557,021.80 : x - Step 2: Convert to fraction form
90,626,948.20/135,940,422.30 = 81,557,021.80/x - Step 3: Cross multiply
90,626,948.20x = 135,940,422.30 × 81,557,021.80 - Step 4: Simplify right side
90,626,948.20x = 11,086,895,985,022,306 - Step 5: Solve for x
x = 11,086,895,985,022,306/90,626,948.20 - Step 6: Final answer
x = 122,335,532.70
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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.