Finding the Fourth Proportional to 137,346.12, 189,574.29 and 128,982.06
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Solution
The fourth proportional to 137,346.12, 189,574.29 and 128,982.06 is: 178,029.66
Step by Step Solution
- Step 1: Write the proportion equation
137,346.12 : 189,574.29 = 128,982.06 : x - Step 2: Convert to fraction form
137,346.12/189,574.29 = 128,982.06/x - Step 3: Cross multiply
137,346.12x = 189,574.29 × 128,982.06 - Step 4: Simplify right side
137,346.12x = 24,451,682,447.24 - Step 5: Solve for x
x = 24,451,682,447.24/137,346.12 - Step 6: Final answer
x = 178,029.66
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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.