Finding the Fourth Proportional to 86,534.96, 129,549.36 and 78,234.08
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Solution
The fourth proportional to 86,534.96, 129,549.36 and 78,234.08 is: 117,122.32
Step by Step Solution
- Step 1: Write the proportion equation
86,534.96 : 129,549.36 = 78,234.08 : x - Step 2: Convert to fraction form
86,534.96/129,549.36 = 78,234.08/x - Step 3: Cross multiply
86,534.96x = 129,549.36 × 78,234.08 - Step 4: Simplify right side
86,534.96x = 10,135,174,994.19 - Step 5: Solve for x
x = 10,135,174,994.19/86,534.96 - Step 6: Final answer
x = 117,122.32
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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.