Finding the Fourth Proportional to 128,263.60, 192,438.06 and 80,823.88
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Solution
The fourth proportional to 128,263.60, 192,438.06 and 80,823.88 is: 121,262.70
Step by Step Solution
- Step 1: Write the proportion equation
128,263.60 : 192,438.06 = 80,823.88 : x - Step 2: Convert to fraction form
128,263.60/192,438.06 = 80,823.88/x - Step 3: Cross multiply
128,263.60x = 192,438.06 × 80,823.88 - Step 4: Simplify right side
128,263.60x = 15,553,590,668.87 - Step 5: Solve for x
x = 15,553,590,668.87/128,263.60 - Step 6: Final answer
x = 121,262.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.