Finding the Fourth Proportional to 218,689.97, 301,867.63 and 128,075.06
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Solution
The fourth proportional to 218,689.97, 301,867.63 and 128,075.06 is: 176,787.79
Step by Step Solution
- Step 1: Write the proportion equation
218,689.97 : 301,867.63 = 128,075.06 : x - Step 2: Convert to fraction form
218,689.97/301,867.63 = 128,075.06/x - Step 3: Cross multiply
218,689.97x = 301,867.63 × 128,075.06 - Step 4: Simplify right side
218,689.97x = 38,661,715,258.79 - Step 5: Solve for x
x = 38,661,715,258.79/218,689.97 - Step 6: Final answer
x = 176,787.79
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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.