Finding the Fourth Proportional to 87,007.70, 130,511.55 and 76,639.70
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Solution
The fourth proportional to 87,007.70, 130,511.55 and 76,639.70 is: 114,959.55
Step by Step Solution
- Step 1: Write the proportion equation
87,007.70 : 130,511.55 = 76,639.70 : x - Step 2: Convert to fraction form
87,007.70/130,511.55 = 76,639.70/x - Step 3: Cross multiply
87,007.70x = 130,511.55 × 76,639.70 - Step 4: Simplify right side
87,007.70x = 10,002,366,038.54 - Step 5: Solve for x
x = 10,002,366,038.54/87,007.70 - Step 6: Final answer
x = 114,959.55
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.