Finding the Fourth Proportional to 100,117,669.92, 138,155,686.36 and 55,460,618.09
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Solution
The fourth proportional to 100,117,669.92, 138,155,686.36 and 55,460,618.09 is: 76,531,942.51
Step by Step Solution
- Step 1: Write the proportion equation
100,117,669.92 : 138,155,686.36 = 55,460,618.09 : x - Step 2: Convert to fraction form
100,117,669.92/138,155,686.36 = 55,460,618.09/x - Step 3: Cross multiply
100,117,669.92x = 138,155,686.36 × 55,460,618.09 - Step 4: Simplify right side
100,117,669.92x = 7,662,199,757,862,435 - Step 5: Solve for x
x = 7,662,199,757,862,435/100,117,669.92 - Step 6: Final answer
x = 76,531,942.51
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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.