Finding the Fourth Proportional to 145,959.57, 201,424.12 and 78,891.57
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Solution
The fourth proportional to 145,959.57, 201,424.12 and 78,891.57 is: 108,870.32
Step by Step Solution
- Step 1: Write the proportion equation
145,959.57 : 201,424.12 = 78,891.57 : x - Step 2: Convert to fraction form
145,959.57/201,424.12 = 78,891.57/x - Step 3: Cross multiply
145,959.57x = 201,424.12 × 78,891.57 - Step 4: Simplify right side
145,959.57x = 15,890,664,865.44 - Step 5: Solve for x
x = 15,890,664,865.44/145,959.57 - Step 6: Final answer
x = 108,870.32
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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.