Finding the Fourth Proportional to 100,423.56, 138,584.58 and 55,711.56
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Solution
The fourth proportional to 100,423.56, 138,584.58 and 55,711.56 is: 76,881.99
Step by Step Solution
- Step 1: Write the proportion equation
100,423.56 : 138,584.58 = 55,711.56 : x - Step 2: Convert to fraction form
100,423.56/138,584.58 = 55,711.56/x - Step 3: Cross multiply
100,423.56x = 138,584.58 × 55,711.56 - Step 4: Simplify right side
100,423.56x = 7,720,763,143.74 - Step 5: Solve for x
x = 7,720,763,143.74/100,423.56 - Step 6: Final answer
x = 76,881.99
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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.