Finding the Fourth Proportional to 128,124,680.23, 176,811,115.78 and 69,385,982.72
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Solution
The fourth proportional to 128,124,680.23, 176,811,115.78 and 69,385,982.72 is: 95,752,145.51
Step by Step Solution
- Step 1: Write the proportion equation
128,124,680.23 : 176,811,115.78 = 69,385,982.72 : x - Step 2: Convert to fraction form
128,124,680.23/176,811,115.78 = 69,385,982.72/x - Step 3: Cross multiply
128,124,680.23x = 176,811,115.78 × 69,385,982.72 - Step 4: Simplify right side
128,124,680.23x = 12,268,213,024,215,000 - Step 5: Solve for x
x = 12,268,213,024,215,000/128,124,680.23 - Step 6: Final answer
x = 95,752,145.51
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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.