Finding the Fourth Proportional to 129,386.88, 178,549.92 and 72,794.88
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Solution
The fourth proportional to 129,386.88, 178,549.92 and 72,794.88 is: 100,454.70
Step by Step Solution
- Step 1: Write the proportion equation
129,386.88 : 178,549.92 = 72,794.88 : x - Step 2: Convert to fraction form
129,386.88/178,549.92 = 72,794.88/x - Step 3: Cross multiply
129,386.88x = 178,549.92 × 72,794.88 - Step 4: Simplify right side
129,386.88x = 12,997,520,000.41 - Step 5: Solve for x
x = 12,997,520,000.41/129,386.88 - Step 6: Final answer
x = 100,454.70
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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.