Finding the Fourth Proportional to 77,639.29, 107,139.74 and 43,649.21
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Solution
The fourth proportional to 77,639.29, 107,139.74 and 43,649.21 is: 60,234.52
Step by Step Solution
- Step 1: Write the proportion equation
77,639.29 : 107,139.74 = 43,649.21 : x - Step 2: Convert to fraction form
77,639.29/107,139.74 = 43,649.21/x - Step 3: Cross multiply
77,639.29x = 107,139.74 × 43,649.21 - Step 4: Simplify right side
77,639.29x = 4,676,565,060.21 - Step 5: Solve for x
x = 4,676,565,060.21/77,639.29 - Step 6: Final answer
x = 60,234.52
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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.