Finding the Fourth Proportional to 128,934.06, 177,932.07 and 72,349.62
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Solution
The fourth proportional to 128,934.06, 177,932.07 and 72,349.62 is: 99,844.20
Step by Step Solution
- Step 1: Write the proportion equation
128,934.06 : 177,932.07 = 72,349.62 : x - Step 2: Convert to fraction form
128,934.06/177,932.07 = 72,349.62/x - Step 3: Cross multiply
128,934.06x = 177,932.07 × 72,349.62 - Step 4: Simplify right side
128,934.06x = 12,873,317,650.31 - Step 5: Solve for x
x = 12,873,317,650.31/128,934.06 - Step 6: Final answer
x = 99,844.20
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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.