Finding the Fourth Proportional to 120,591.79, 180,829.36 and 70,688.09
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Solution
The fourth proportional to 120,591.79, 180,829.36 and 70,688.09 is: 105,997.95
Step by Step Solution
- Step 1: Write the proportion equation
120,591.79 : 180,829.36 = 70,688.09 : x - Step 2: Convert to fraction form
120,591.79/180,829.36 = 70,688.09/x - Step 3: Cross multiply
120,591.79x = 180,829.36 × 70,688.09 - Step 4: Simplify right side
120,591.79x = 12,782,482,614.76 - Step 5: Solve for x
x = 12,782,482,614.76/120,591.79 - Step 6: Final answer
x = 105,997.95
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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.