Finding the Fourth Proportional to 99,772.26, 137,649.61 and 76,809.09
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Solution
The fourth proportional to 99,772.26, 137,649.61 and 76,809.09 is: 105,968.76
Step by Step Solution
- Step 1: Write the proportion equation
99,772.26 : 137,649.61 = 76,809.09 : x - Step 2: Convert to fraction form
99,772.26/137,649.61 = 76,809.09/x - Step 3: Cross multiply
99,772.26x = 137,649.61 × 76,809.09 - Step 4: Simplify right side
99,772.26x = 10,572,741,895.15 - Step 5: Solve for x
x = 10,572,741,895.15/99,772.26 - Step 6: Final answer
x = 105,968.76
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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.