Finding the Fourth Proportional to 209,885,821.79, 289,643,440.17 and 115,799,963.99
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Solution
The fourth proportional to 209,885,821.79, 289,643,440.17 and 115,799,963.99 is: 159,804,505.40
Step by Step Solution
- Step 1: Write the proportion equation
209,885,821.79 : 289,643,440.17 = 115,799,963.99 : x - Step 2: Convert to fraction form
209,885,821.79/289,643,440.17 = 115,799,963.99/x - Step 3: Cross multiply
209,885,821.79x = 289,643,440.17 × 115,799,963.99 - Step 4: Simplify right side
209,885,821.79x = 33,540,699,941,625,720 - Step 5: Solve for x
x = 33,540,699,941,625,720/209,885,821.79 - Step 6: Final answer
x = 159,804,505.40
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.