Finding the Fourth Proportional to 107,989.20, 161,765.10 and 74,746.80
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Solution
The fourth proportional to 107,989.20, 161,765.10 and 74,746.80 is: 111,968.82
Step by Step Solution
- Step 1: Write the proportion equation
107,989.20 : 161,765.10 = 74,746.80 : x - Step 2: Convert to fraction form
107,989.20/161,765.10 = 74,746.80/x - Step 3: Cross multiply
107,989.20x = 161,765.10 × 74,746.80 - Step 4: Simplify right side
107,989.20x = 12,091,423,576.68 - Step 5: Solve for x
x = 12,091,423,576.68/107,989.20 - Step 6: Final answer
x = 111,968.82
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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.