Finding the Fourth Proportional to 128,131.74, 176,904.99 and 114,679.62
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Solution
The fourth proportional to 128,131.74, 176,904.99 and 114,679.62 is: 158,332.33
Step by Step Solution
- Step 1: Write the proportion equation
128,131.74 : 176,904.99 = 114,679.62 : x - Step 2: Convert to fraction form
128,131.74/176,904.99 = 114,679.62/x - Step 3: Cross multiply
128,131.74x = 176,904.99 × 114,679.62 - Step 4: Simplify right side
128,131.74x = 20,287,397,029.30 - Step 5: Solve for x
x = 20,287,397,029.30/128,131.74 - Step 6: Final answer
x = 158,332.33
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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.