Finding the Fourth Proportional to 106,539.70, 159,809.55 and 87,512.80
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Solution
The fourth proportional to 106,539.70, 159,809.55 and 87,512.80 is: 131,269.20
Step by Step Solution
- Step 1: Write the proportion equation
106,539.70 : 159,809.55 = 87,512.80 : x - Step 2: Convert to fraction form
106,539.70/159,809.55 = 87,512.80/x - Step 3: Cross multiply
106,539.70x = 159,809.55 × 87,512.80 - Step 4: Simplify right side
106,539.70x = 13,985,381,187.24 - Step 5: Solve for x
x = 13,985,381,187.24/106,539.70 - Step 6: Final answer
x = 131,269.20
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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.