Finding the Fourth Proportional to 86,423.80, 129,635.70 and 73,739.20
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Solution
The fourth proportional to 86,423.80, 129,635.70 and 73,739.20 is: 110,608.80
Step by Step Solution
- Step 1: Write the proportion equation
86,423.80 : 129,635.70 = 73,739.20 : x - Step 2: Convert to fraction form
86,423.80/129,635.70 = 73,739.20/x - Step 3: Cross multiply
86,423.80x = 129,635.70 × 73,739.20 - Step 4: Simplify right side
86,423.80x = 9,559,232,809.44 - Step 5: Solve for x
x = 9,559,232,809.44/86,423.80 - Step 6: Final answer
x = 110,608.80
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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.