Finding the Fourth Proportional to 129,015.10, 178,009.68 and 75,269.44
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Solution
The fourth proportional to 129,015.10, 178,009.68 and 75,269.44 is: 103,853.65
Step by Step Solution
- Step 1: Write the proportion equation
129,015.10 : 178,009.68 = 75,269.44 : x - Step 2: Convert to fraction form
129,015.10/178,009.68 = 75,269.44/x - Step 3: Cross multiply
129,015.10x = 178,009.68 × 75,269.44 - Step 4: Simplify right side
129,015.10x = 13,398,688,928.18 - Step 5: Solve for x
x = 13,398,688,928.18/129,015.10 - Step 6: Final answer
x = 103,853.65
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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.