Finding the Fourth Proportional to 189,538.64, 261,479.46 and 128,262.99
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Solution
The fourth proportional to 189,538.64, 261,479.46 and 128,262.99 is: 176,946.18
Step by Step Solution
- Step 1: Write the proportion equation
189,538.64 : 261,479.46 = 128,262.99 : x - Step 2: Convert to fraction form
189,538.64/261,479.46 = 128,262.99/x - Step 3: Cross multiply
189,538.64x = 261,479.46 × 128,262.99 - Step 4: Simplify right side
189,538.64x = 33,538,137,363.19 - Step 5: Solve for x
x = 33,538,137,363.19/189,538.64 - Step 6: Final answer
x = 176,946.18
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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.