Finding the Fourth Proportional to 138,386.14, 190,974.99 and 81,802.78
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Solution
The fourth proportional to 138,386.14, 190,974.99 and 81,802.78 is: 112,889.09
Step by Step Solution
- Step 1: Write the proportion equation
138,386.14 : 190,974.99 = 81,802.78 : x - Step 2: Convert to fraction form
138,386.14/190,974.99 = 81,802.78/x - Step 3: Cross multiply
138,386.14x = 190,974.99 × 81,802.78 - Step 4: Simplify right side
138,386.14x = 15,622,285,092.47 - Step 5: Solve for x
x = 15,622,285,092.47/138,386.14 - Step 6: Final answer
x = 112,889.09
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1.5x scale
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.