Finding the Fourth Proportional to 86,645.80, 129,774.30 and 84,701.80
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Solution
The fourth proportional to 86,645.80, 129,774.30 and 84,701.80 is: 126,862.66
Step by Step Solution
- Step 1: Write the proportion equation
86,645.80 : 129,774.30 = 84,701.80 : x - Step 2: Convert to fraction form
86,645.80/129,774.30 = 84,701.80/x - Step 3: Cross multiply
86,645.80x = 129,774.30 × 84,701.80 - Step 4: Simplify right side
86,645.80x = 10,992,116,803.74 - Step 5: Solve for x
x = 10,992,116,803.74/86,645.80 - Step 6: Final answer
x = 126,862.66
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.