Finding the Fourth Proportional to 128,203,785.80, 192,305,678.70 and 115,438,704.20
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Solution
The fourth proportional to 128,203,785.80, 192,305,678.70 and 115,438,704.20 is: 173,158,056.30
Step by Step Solution
- Step 1: Write the proportion equation
128,203,785.80 : 192,305,678.70 = 115,438,704.20 : x - Step 2: Convert to fraction form
128,203,785.80/192,305,678.70 = 115,438,704.20/x - Step 3: Cross multiply
128,203,785.80x = 192,305,678.70 × 115,438,704.20 - Step 4: Simplify right side
128,203,785.80x = 22,199,518,359,429,540 - Step 5: Solve for x
x = 22,199,518,359,429,540/128,203,785.80 - Step 6: Final answer
x = 173,158,056.30
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.