Finding the Fourth Proportional to 129,247.97, 178,365.26 and 71,889.62
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Solution
The fourth proportional to 129,247.97, 178,365.26 and 71,889.62 is: 99,209.38
Step by Step Solution
- Step 1: Write the proportion equation
129,247.97 : 178,365.26 = 71,889.62 : x - Step 2: Convert to fraction form
129,247.97/178,365.26 = 71,889.62/x - Step 3: Cross multiply
129,247.97x = 178,365.26 × 71,889.62 - Step 4: Simplify right side
129,247.97x = 12,822,610,050.50 - Step 5: Solve for x
x = 12,822,610,050.50/129,247.97 - Step 6: Final answer
x = 99,209.38
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1.5x scale
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.