Finding the Fourth Proportional to 128,112.36, 176,781.62 and 74,386.88
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Solution
The fourth proportional to 128,112.36, 176,781.62 and 74,386.88 is: 102,646.09
Step by Step Solution
- Step 1: Write the proportion equation
128,112.36 : 176,781.62 = 74,386.88 : x - Step 2: Convert to fraction form
128,112.36/176,781.62 = 74,386.88/x - Step 3: Cross multiply
128,112.36x = 176,781.62 × 74,386.88 - Step 4: Simplify right side
128,112.36x = 13,150,233,153.15 - Step 5: Solve for x
x = 13,150,233,153.15/128,112.36 - Step 6: Final answer
x = 102,646.09
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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.