Finding the Fourth Proportional to 129,159.36, 178,206.48 and 75,436.92
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Solution
The fourth proportional to 129,159.36, 178,206.48 and 75,436.92 is: 104,083.42
Step by Step Solution
- Step 1: Write the proportion equation
129,159.36 : 178,206.48 = 75,436.92 : x - Step 2: Convert to fraction form
129,159.36/178,206.48 = 75,436.92/x - Step 3: Cross multiply
129,159.36x = 178,206.48 × 75,436.92 - Step 4: Simplify right side
129,159.36x = 13,443,347,975.24 - Step 5: Solve for x
x = 13,443,347,975.24/129,159.36 - Step 6: Final answer
x = 104,083.42
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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.