Finding the Fourth Proportional to 128,623.04, 177,381.12 and 88,265.60
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Solution
The fourth proportional to 128,623.04, 177,381.12 and 88,265.60 is: 121,725.09
Step by Step Solution
- Step 1: Write the proportion equation
128,623.04 : 177,381.12 = 88,265.60 : x - Step 2: Convert to fraction form
128,623.04/177,381.12 = 88,265.60/x - Step 3: Cross multiply
128,623.04x = 177,381.12 × 88,265.60 - Step 4: Simplify right side
128,623.04x = 15,656,650,985.47 - Step 5: Solve for x
x = 15,656,650,985.47/128,623.04 - Step 6: Final answer
x = 121,725.09
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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.