Finding the Fourth Proportional to 138,325.14, 207,155.12 and 78,980.94
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Solution
The fourth proportional to 138,325.14, 207,155.12 and 78,980.94 is: 118,281.50
Step by Step Solution
- Step 1: Write the proportion equation
138,325.14 : 207,155.12 = 78,980.94 : x - Step 2: Convert to fraction form
138,325.14/207,155.12 = 78,980.94/x - Step 3: Cross multiply
138,325.14x = 207,155.12 × 78,980.94 - Step 4: Simplify right side
138,325.14x = 16,361,305,708.51 - Step 5: Solve for x
x = 16,361,305,708.51/138,325.14 - Step 6: Final answer
x = 118,281.50
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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.