Finding the Fourth Proportional to 81,392.80, 121,984.08 and 65,605.12
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Solution
The fourth proportional to 81,392.80, 121,984.08 and 65,605.12 is: 98,322.95
Step by Step Solution
- Step 1: Write the proportion equation
81,392.80 : 121,984.08 = 65,605.12 : x - Step 2: Convert to fraction form
81,392.80/121,984.08 = 65,605.12/x - Step 3: Cross multiply
81,392.80x = 121,984.08 × 65,605.12 - Step 4: Simplify right side
81,392.80x = 8,002,780,206.49 - Step 5: Solve for x
x = 8,002,780,206.49/81,392.80 - Step 6: Final answer
x = 98,322.95
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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.