Finding the Fourth Proportional to 86,720.48, 129,979.36 and 36,783.68
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Solution
The fourth proportional to 86,720.48, 129,979.36 and 36,783.68 is: 55,132.53
Step by Step Solution
- Step 1: Write the proportion equation
86,720.48 : 129,979.36 = 36,783.68 : x - Step 2: Convert to fraction form
86,720.48/129,979.36 = 36,783.68/x - Step 3: Cross multiply
86,720.48x = 129,979.36 × 36,783.68 - Step 4: Simplify right side
86,720.48x = 4,781,119,184.84 - Step 5: Solve for x
x = 4,781,119,184.84/86,720.48 - Step 6: Final answer
x = 55,132.53
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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.