Finding the Fourth Proportional to 107,913.10, 161,869.65 and 85,605.70
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Solution
The fourth proportional to 107,913.10, 161,869.65 and 85,605.70 is: 128,408.55
Step by Step Solution
- Step 1: Write the proportion equation
107,913.10 : 161,869.65 = 85,605.70 : x - Step 2: Convert to fraction form
107,913.10/161,869.65 = 85,605.70/x - Step 3: Cross multiply
107,913.10x = 161,869.65 × 85,605.70 - Step 4: Simplify right side
107,913.10x = 13,856,964,697.01 - Step 5: Solve for x
x = 13,856,964,697.01/107,913.10 - Step 6: Final answer
x = 128,408.55
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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.