Finding the Fourth Proportional to 128,901.05, 177,884.66 and 72,313.64
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Solution
The fourth proportional to 128,901.05, 177,884.66 and 72,313.64 is: 99,793.50
Step by Step Solution
- Step 1: Write the proportion equation
128,901.05 : 177,884.66 = 72,313.64 : x - Step 2: Convert to fraction form
128,901.05/177,884.66 = 72,313.64/x - Step 3: Cross multiply
128,901.05x = 177,884.66 × 72,313.64 - Step 4: Simplify right side
128,901.05x = 12,863,487,264.76 - Step 5: Solve for x
x = 12,863,487,264.76/128,901.05 - Step 6: Final answer
x = 99,793.50
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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.