Finding the Fourth Proportional to 156,913.05, 216,589.55 and 100,324.65
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Solution
The fourth proportional to 156,913.05, 216,589.55 and 100,324.65 is: 138,479.69
Step by Step Solution
- Step 1: Write the proportion equation
156,913.05 : 216,589.55 = 100,324.65 : x - Step 2: Convert to fraction form
156,913.05/216,589.55 = 100,324.65/x - Step 3: Cross multiply
156,913.05x = 216,589.55 × 100,324.65 - Step 4: Simplify right side
156,913.05x = 21,729,270,295.78 - Step 5: Solve for x
x = 21,729,270,295.78/156,913.05 - Step 6: Final answer
x = 138,479.69
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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.