Finding the Fourth Proportional to 86,959.80, 130,439.70 and 84,655.80
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Solution
The fourth proportional to 86,959.80, 130,439.70 and 84,655.80 is: 126,983.70
Step by Step Solution
- Step 1: Write the proportion equation
86,959.80 : 130,439.70 = 84,655.80 : x - Step 2: Convert to fraction form
86,959.80/130,439.70 = 84,655.80/x - Step 3: Cross multiply
86,959.80x = 130,439.70 × 84,655.80 - Step 4: Simplify right side
86,959.80x = 11,042,477,155.26 - Step 5: Solve for x
x = 11,042,477,155.26/86,959.80 - Step 6: Final answer
x = 126,983.70
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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.