Finding the Fourth Proportional to 100,217.70, 138,312.09 and 57,777.75
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Solution
The fourth proportional to 100,217.70, 138,312.09 and 57,777.75 is: 79,740.02
Step by Step Solution
- Step 1: Write the proportion equation
100,217.70 : 138,312.09 = 57,777.75 : x - Step 2: Convert to fraction form
100,217.70/138,312.09 = 57,777.75/x - Step 3: Cross multiply
100,217.70x = 138,312.09 × 57,777.75 - Step 4: Simplify right side
100,217.70x = 7,991,361,358.00 - Step 5: Solve for x
x = 7,991,361,358.00/100,217.70 - Step 6: Final answer
x = 79,740.02
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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.