Finding the Fourth Proportional to 99,689.28, 149,596.17 and 66,432.68
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Solution
The fourth proportional to 99,689.28, 149,596.17 and 66,432.68 is: 99,690.50
Step by Step Solution
- Step 1: Write the proportion equation
99,689.28 : 149,596.17 = 66,432.68 : x - Step 2: Convert to fraction form
99,689.28/149,596.17 = 66,432.68/x - Step 3: Cross multiply
99,689.28x = 149,596.17 × 66,432.68 - Step 4: Simplify right side
99,689.28x = 9,938,074,490.84 - Step 5: Solve for x
x = 9,938,074,490.84/99,689.28 - Step 6: Final answer
x = 99,690.50
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1.5x scale
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.