Finding the Fourth Proportional to 278,657.21, 417,903.81 and 78,995.05
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Solution
The fourth proportional to 278,657.21, 417,903.81 and 78,995.05 is: 118,469.32
Step by Step Solution
- Step 1: Write the proportion equation
278,657.21 : 417,903.81 = 78,995.05 : x - Step 2: Convert to fraction form
278,657.21/417,903.81 = 78,995.05/x - Step 3: Cross multiply
278,657.21x = 417,903.81 × 78,995.05 - Step 4: Simplify right side
278,657.21x = 33,012,331,025.15 - Step 5: Solve for x
x = 33,012,331,025.15/278,657.21 - Step 6: Final answer
x = 118,469.32
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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.