Finding the Fourth Proportional to 86,130.63, 128,701.83 and 65,754.63
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Solution
The fourth proportional to 86,130.63, 128,701.83 and 65,754.63 is: 98,254.72
Step by Step Solution
- Step 1: Write the proportion equation
86,130.63 : 128,701.83 = 65,754.63 : x - Step 2: Convert to fraction form
86,130.63/128,701.83 = 65,754.63/x - Step 3: Cross multiply
86,130.63x = 128,701.83 × 65,754.63 - Step 4: Simplify right side
86,130.63x = 8,462,741,211.97 - Step 5: Solve for x
x = 8,462,741,211.97/86,130.63 - Step 6: Final answer
x = 98,254.72
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.