Finding the Fourth Proportional to 128,287.53, 177,023.07 and 74,561.31
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Solution
The fourth proportional to 128,287.53, 177,023.07 and 74,561.31 is: 102,886.63
Step by Step Solution
- Step 1: Write the proportion equation
128,287.53 : 177,023.07 = 74,561.31 : x - Step 2: Convert to fraction form
128,287.53/177,023.07 = 74,561.31/x - Step 3: Cross multiply
128,287.53x = 177,023.07 × 74,561.31 - Step 4: Simplify right side
128,287.53x = 13,199,071,999.42 - Step 5: Solve for x
x = 13,199,071,999.42/128,287.53 - Step 6: Final answer
x = 102,886.63
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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.