Finding the Fourth Proportional to 128,457,367.28, 177,271,332.84 and 69,720,025.71
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Solution
The fourth proportional to 128,457,367.28, 177,271,332.84 and 69,720,025.71 is: 96,213,725.57
Step by Step Solution
- Step 1: Write the proportion equation
128,457,367.28 : 177,271,332.84 = 69,720,025.71 : x - Step 2: Convert to fraction form
128,457,367.28/177,271,332.84 = 69,720,025.71/x - Step 3: Cross multiply
128,457,367.28x = 177,271,332.84 × 69,720,025.71 - Step 4: Simplify right side
128,457,367.28x = 12,359,361,883,250,766 - Step 5: Solve for x
x = 12,359,361,883,250,766/128,457,367.28 - Step 6: Final answer
x = 96,213,725.57
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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.