Finding the Fourth Proportional to 128,692,581.68, 177,597,476.16 and 69,956,147.72
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Solution
The fourth proportional to 128,692,581.68, 177,597,476.16 and 69,956,147.72 is: 96,540,415.27
Step by Step Solution
- Step 1: Write the proportion equation
128,692,581.68 : 177,597,476.16 = 69,956,147.72 : x - Step 2: Convert to fraction form
128,692,581.68/177,597,476.16 = 69,956,147.72/x - Step 3: Cross multiply
128,692,581.68x = 177,597,476.16 × 69,956,147.72 - Step 4: Simplify right side
128,692,581.68x = 12,424,035,276,948,138 - Step 5: Solve for x
x = 12,424,035,276,948,138/128,692,581.68 - Step 6: Final answer
x = 96,540,415.27
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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.