Finding the Fourth Proportional to 126,153.60, 189,230.40 and 121,315.20
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Solution
The fourth proportional to 126,153.60, 189,230.40 and 121,315.20 is: 181,972.80
Step by Step Solution
- Step 1: Write the proportion equation
126,153.60 : 189,230.40 = 121,315.20 : x - Step 2: Convert to fraction form
126,153.60/189,230.40 = 121,315.20/x - Step 3: Cross multiply
126,153.60x = 189,230.40 × 121,315.20 - Step 4: Simplify right side
126,153.60x = 22,956,523,822.08 - Step 5: Solve for x
x = 22,956,523,822.08/126,153.60 - Step 6: Final answer
x = 181,972.80
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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.