Finding the Fourth Proportional to 128,867.04, 177,844.68 and 72,286.92
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Solution
The fourth proportional to 128,867.04, 177,844.68 and 72,286.92 is: 99,760.53
Step by Step Solution
- Step 1: Write the proportion equation
128,867.04 : 177,844.68 = 72,286.92 : x - Step 2: Convert to fraction form
128,867.04/177,844.68 = 72,286.92/x - Step 3: Cross multiply
128,867.04x = 177,844.68 × 72,286.92 - Step 4: Simplify right side
128,867.04x = 12,855,844,155.59 - Step 5: Solve for x
x = 12,855,844,155.59/128,867.04 - Step 6: Final answer
x = 99,760.53
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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.