Finding the Fourth Proportional to 140,391.06, 193,739.20 and 76,728.84
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Solution
The fourth proportional to 140,391.06, 193,739.20 and 76,728.84 is: 105,885.55
Step by Step Solution
- Step 1: Write the proportion equation
140,391.06 : 193,739.20 = 76,728.84 : x - Step 2: Convert to fraction form
140,391.06/193,739.20 = 76,728.84/x - Step 3: Cross multiply
140,391.06x = 193,739.20 × 76,728.84 - Step 4: Simplify right side
140,391.06x = 14,865,384,078.53 - Step 5: Solve for x
x = 14,865,384,078.53/140,391.06 - Step 6: Final answer
x = 105,885.55
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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.