Finding the Fourth Proportional to 129,656.79, 178,859.68 and 86,622.55
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Solution
The fourth proportional to 129,656.79, 178,859.68 and 86,622.55 is: 119,494.56
Step by Step Solution
- Step 1: Write the proportion equation
129,656.79 : 178,859.68 = 86,622.55 : x - Step 2: Convert to fraction form
129,656.79/178,859.68 = 86,622.55/x - Step 3: Cross multiply
129,656.79x = 178,859.68 × 86,622.55 - Step 4: Simplify right side
129,656.79x = 15,493,280,910.08 - Step 5: Solve for x
x = 15,493,280,910.08/129,656.79 - Step 6: Final answer
x = 119,494.56
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.