Finding the Fourth Proportional to 71,320.80, 106,981.20 and 66,655.20
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Solution
The fourth proportional to 71,320.80, 106,981.20 and 66,655.20 is: 99,982.80
Step by Step Solution
- Step 1: Write the proportion equation
71,320.80 : 106,981.20 = 66,655.20 : x - Step 2: Convert to fraction form
71,320.80/106,981.20 = 66,655.20/x - Step 3: Cross multiply
71,320.80x = 106,981.20 × 66,655.20 - Step 4: Simplify right side
71,320.80x = 7,130,853,282.24 - Step 5: Solve for x
x = 7,130,853,282.24/71,320.80 - Step 6: Final answer
x = 99,982.80
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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.