Finding the Fourth Proportional to 128,578.17, 177,448.58 and 74,859.98
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Solution
The fourth proportional to 128,578.17, 177,448.58 and 74,859.98 is: 103,313.00
Step by Step Solution
- Step 1: Write the proportion equation
128,578.17 : 177,448.58 = 74,859.98 : x - Step 2: Convert to fraction form
128,578.17/177,448.58 = 74,859.98/x - Step 3: Cross multiply
128,578.17x = 177,448.58 × 74,859.98 - Step 4: Simplify right side
128,578.17x = 13,283,795,888.29 - Step 5: Solve for x
x = 13,283,795,888.29/128,578.17 - Step 6: Final answer
x = 103,313.00
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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.