Finding the Fourth Proportional to 77,838.97, 107,380.49 and 74,821.21
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Solution
The fourth proportional to 77,838.97, 107,380.49 and 74,821.21 is: 103,217.43
Step by Step Solution
- Step 1: Write the proportion equation
77,838.97 : 107,380.49 = 74,821.21 : x - Step 2: Convert to fraction form
77,838.97/107,380.49 = 74,821.21/x - Step 3: Cross multiply
77,838.97x = 107,380.49 × 74,821.21 - Step 4: Simplify right side
77,838.97x = 8,034,337,830.22 - Step 5: Solve for x
x = 8,034,337,830.22/77,838.97 - Step 6: Final answer
x = 103,217.43
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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.