Finding the Fourth Proportional to 128,555,581.49, 177,417,643.58 and 72,810,918.44
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Solution
The fourth proportional to 128,555,581.49, 177,417,643.58 and 72,810,918.44 is: 100,485,264.25
Step by Step Solution
- Step 1: Write the proportion equation
128,555,581.49 : 177,417,643.58 = 72,810,918.44 : x - Step 2: Convert to fraction form
128,555,581.49/177,417,643.58 = 72,810,918.44/x - Step 3: Cross multiply
128,555,581.49x = 177,417,643.58 × 72,810,918.44 - Step 4: Simplify right side
128,555,581.49x = 12,917,941,576,207,584 - Step 5: Solve for x
x = 12,917,941,576,207,584/128,555,581.49 - Step 6: Final answer
x = 100,485,264.25
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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.