Finding the Fourth Proportional to 76,688.20, 115,032.30 and 68,231.80
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Solution
The fourth proportional to 76,688.20, 115,032.30 and 68,231.80 is: 102,347.70
Step by Step Solution
- Step 1: Write the proportion equation
76,688.20 : 115,032.30 = 68,231.80 : x - Step 2: Convert to fraction form
76,688.20/115,032.30 = 68,231.80/x - Step 3: Cross multiply
76,688.20x = 115,032.30 × 68,231.80 - Step 4: Simplify right side
76,688.20x = 7,848,860,887.14 - Step 5: Solve for x
x = 7,848,860,887.14/76,688.20 - Step 6: Final answer
x = 102,347.70
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1.5x scale
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.