Finding the Fourth Proportional to 129,038.92, 178,069.12 and 72,452.68
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Solution
The fourth proportional to 129,038.92, 178,069.12 and 72,452.68 is: 99,982.12
Step by Step Solution
- Step 1: Write the proportion equation
129,038.92 : 178,069.12 = 72,452.68 : x - Step 2: Convert to fraction form
129,038.92/178,069.12 = 72,452.68/x - Step 3: Cross multiply
129,038.92x = 178,069.12 × 72,452.68 - Step 4: Simplify right side
129,038.92x = 12,901,584,969.24 - Step 5: Solve for x
x = 12,901,584,969.24/129,038.92 - Step 6: Final answer
x = 99,982.12
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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.