Finding the Fourth Proportional to 74,755.80, 112,133.70 and 66,445.20
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Solution
The fourth proportional to 74,755.80, 112,133.70 and 66,445.20 is: 99,667.80
Step by Step Solution
- Step 1: Write the proportion equation
74,755.80 : 112,133.70 = 66,445.20 : x - Step 2: Convert to fraction form
74,755.80/112,133.70 = 66,445.20/x - Step 3: Cross multiply
74,755.80x = 112,133.70 × 66,445.20 - Step 4: Simplify right side
74,755.80x = 7,450,746,123.24 - Step 5: Solve for x
x = 7,450,746,123.24/74,755.80 - Step 6: Final answer
x = 99,667.80
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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.