Finding the Fourth Proportional to 128,431,969.66, 177,236,239.35 and 73,428,977.98
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Solution
The fourth proportional to 128,431,969.66, 177,236,239.35 and 73,428,977.98 is: 101,332,058.92
Step by Step Solution
- Step 1: Write the proportion equation
128,431,969.66 : 177,236,239.35 = 73,428,977.98 : x - Step 2: Convert to fraction form
128,431,969.66/177,236,239.35 = 73,428,977.98/x - Step 3: Cross multiply
128,431,969.66x = 177,236,239.35 × 73,428,977.98 - Step 4: Simplify right side
128,431,969.66x = 13,014,275,916,489,160 - Step 5: Solve for x
x = 13,014,275,916,489,160/128,431,969.66 - Step 6: Final answer
x = 101,332,058.92
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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.