Finding the Fourth Proportional to 206,657,686.84, 309,986,530.72 and 85,489,138.84
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Solution
The fourth proportional to 206,657,686.84, 309,986,530.72 and 85,489,138.84 is: 128,233,708.45
Step by Step Solution
- Step 1: Write the proportion equation
206,657,686.84 : 309,986,530.72 = 85,489,138.84 : x - Step 2: Convert to fraction form
206,657,686.84/309,986,530.72 = 85,489,138.84/x - Step 3: Cross multiply
206,657,686.84x = 309,986,530.72 × 85,489,138.84 - Step 4: Simplify right side
206,657,686.84x = 26,500,481,563,252,008 - Step 5: Solve for x
x = 26,500,481,563,252,008/206,657,686.84 - Step 6: Final answer
x = 128,233,708.45
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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.