Finding the Fourth Proportional to 99,660.60, 138,483.87 and 98,403.09
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Solution
The fourth proportional to 99,660.60, 138,483.87 and 98,403.09 is: 136,736.49
Step by Step Solution
- Step 1: Write the proportion equation
99,660.60 : 138,483.87 = 98,403.09 : x - Step 2: Convert to fraction form
99,660.60/138,483.87 = 98,403.09/x - Step 3: Cross multiply
99,660.60x = 138,483.87 × 98,403.09 - Step 4: Simplify right side
99,660.60x = 13,627,240,723.16 - Step 5: Solve for x
x = 13,627,240,723.16/99,660.60 - Step 6: Final answer
x = 136,736.49
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.