Finding the Fourth Proportional to 76,803.60, 115,278.30 and 65,722.80
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Solution
The fourth proportional to 76,803.60, 115,278.30 and 65,722.80 is: 98,646.58
Step by Step Solution
- Step 1: Write the proportion equation
76,803.60 : 115,278.30 = 65,722.80 : x - Step 2: Convert to fraction form
76,803.60/115,278.30 = 65,722.80/x - Step 3: Cross multiply
76,803.60x = 115,278.30 × 65,722.80 - Step 4: Simplify right side
76,803.60x = 7,576,412,655.24 - Step 5: Solve for x
x = 7,576,412,655.24/76,803.60 - Step 6: Final answer
x = 98,646.58
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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.