Finding the Fourth Proportional to 86,903.80, 119,865.28 and 79,756.75
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Solution
The fourth proportional to 86,903.80, 119,865.28 and 79,756.75 is: 110,007.45
Step by Step Solution
- Step 1: Write the proportion equation
86,903.80 : 119,865.28 = 79,756.75 : x - Step 2: Convert to fraction form
86,903.80/119,865.28 = 79,756.75/x - Step 3: Cross multiply
86,903.80x = 119,865.28 × 79,756.75 - Step 4: Simplify right side
86,903.80x = 9,560,065,170.64 - Step 5: Solve for x
x = 9,560,065,170.64/86,903.80 - Step 6: Final answer
x = 110,007.45
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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.