Finding the Fourth Proportional to 128,120,825.91, 176,805,815.61 and 69,382,128.41
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Solution
The fourth proportional to 128,120,825.91, 176,805,815.61 and 69,382,128.41 is: 95,746,836.75
Step by Step Solution
- Step 1: Write the proportion equation
128,120,825.91 : 176,805,815.61 = 69,382,128.41 : x - Step 2: Convert to fraction form
128,120,825.91/176,805,815.61 = 69,382,128.41/x - Step 3: Cross multiply
128,120,825.91x = 176,805,815.61 × 69,382,128.41 - Step 4: Simplify right side
128,120,825.91x = 12,267,163,802,287,802 - Step 5: Solve for x
x = 12,267,163,802,287,802/128,120,825.91 - Step 6: Final answer
x = 95,746,836.75
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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.