Finding the Fourth Proportional to 128,552.60, 177,381.51 and 80,772.14
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Solution
The fourth proportional to 128,552.60, 177,381.51 and 80,772.14 is: 111,452.31
Step by Step Solution
- Step 1: Write the proportion equation
128,552.60 : 177,381.51 = 80,772.14 : x - Step 2: Convert to fraction form
128,552.60/177,381.51 = 80,772.14/x - Step 3: Cross multiply
128,552.60x = 177,381.51 × 80,772.14 - Step 4: Simplify right side
128,552.60x = 14,327,484,159.13 - Step 5: Solve for x
x = 14,327,484,159.13/128,552.60 - Step 6: Final answer
x = 111,452.31
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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.