Finding the Fourth Proportional to 128,954.76, 177,957.66 and 72,366.13
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Solution
The fourth proportional to 128,954.76, 177,957.66 and 72,366.13 is: 99,865.31
Step by Step Solution
- Step 1: Write the proportion equation
128,954.76 : 177,957.66 = 72,366.13 : x - Step 2: Convert to fraction form
128,954.76/177,957.66 = 72,366.13/x - Step 3: Cross multiply
128,954.76x = 177,957.66 × 72,366.13 - Step 4: Simplify right side
128,954.76x = 12,878,107,158.06 - Step 5: Solve for x
x = 12,878,107,158.06/128,954.76 - Step 6: Final answer
x = 99,865.31
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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.