Finding the Fourth Proportional to 128,460.71, 177,260.99 and 74,020.81
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Solution
The fourth proportional to 128,460.71, 177,260.99 and 74,020.81 is: 102,140.19
Step by Step Solution
- Step 1: Write the proportion equation
128,460.71 : 177,260.99 = 74,020.81 : x - Step 2: Convert to fraction form
128,460.71/177,260.99 = 74,020.81/x - Step 3: Cross multiply
128,460.71x = 177,260.99 × 74,020.81 - Step 4: Simplify right side
128,460.71x = 13,121,001,691.10 - Step 5: Solve for x
x = 13,121,001,691.10/128,460.71 - Step 6: Final answer
x = 102,140.19
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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.