Finding the Fourth Proportional to 128,577.38, 177,437.39 and 71,988.75
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Solution
The fourth proportional to 128,577.38, 177,437.39 and 71,988.75 is: 99,344.82
Step by Step Solution
- Step 1: Write the proportion equation
128,577.38 : 177,437.39 = 71,988.75 : x - Step 2: Convert to fraction form
128,577.38/177,437.39 = 71,988.75/x - Step 3: Cross multiply
128,577.38x = 177,437.39 × 71,988.75 - Step 4: Simplify right side
128,577.38x = 12,773,495,549.42 - Step 5: Solve for x
x = 12,773,495,549.42/128,577.38 - Step 6: Final answer
x = 99,344.82
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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.