Finding the Fourth Proportional to 128,284.99, 177,028.06 and 70,920.66
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Solution
The fourth proportional to 128,284.99, 177,028.06 and 70,920.66 is: 97,867.62
Step by Step Solution
- Step 1: Write the proportion equation
128,284.99 : 177,028.06 = 70,920.66 : x - Step 2: Convert to fraction form
128,284.99/177,028.06 = 70,920.66/x - Step 3: Cross multiply
128,284.99x = 177,028.06 × 70,920.66 - Step 4: Simplify right side
128,284.99x = 12,554,947,118.99 - Step 5: Solve for x
x = 12,554,947,118.99/128,284.99 - Step 6: Final answer
x = 97,867.62
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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.