Finding the Fourth Proportional to 139,130.64, 191,998.84 and 75,467.08
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Solution
The fourth proportional to 139,130.64, 191,998.84 and 75,467.08 is: 104,143.79
Step by Step Solution
- Step 1: Write the proportion equation
139,130.64 : 191,998.84 = 75,467.08 : x - Step 2: Convert to fraction form
139,130.64/191,998.84 = 75,467.08/x - Step 3: Cross multiply
139,130.64x = 191,998.84 × 75,467.08 - Step 4: Simplify right side
139,130.64x = 14,489,591,818.19 - Step 5: Solve for x
x = 14,489,591,818.19/139,130.64 - Step 6: Final answer
x = 104,143.79
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.