Finding the Fourth Proportional to 99,236.40, 136,916.05 and 56,209.05
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Solution
The fourth proportional to 99,236.40, 136,916.05 and 56,209.05 is: 77,551.39
Step by Step Solution
- Step 1: Write the proportion equation
99,236.40 : 136,916.05 = 56,209.05 : x - Step 2: Convert to fraction form
99,236.40/136,916.05 = 56,209.05/x - Step 3: Cross multiply
99,236.40x = 136,916.05 × 56,209.05 - Step 4: Simplify right side
99,236.40x = 7,695,921,100.25 - Step 5: Solve for x
x = 7,695,921,100.25/99,236.40 - Step 6: Final answer
x = 77,551.39
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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.