Finding the Fourth Proportional to 86,851.13, 129,327.68 and 83,659.05
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Solution
The fourth proportional to 86,851.13, 129,327.68 and 83,659.05 is: 124,574.44
Step by Step Solution
- Step 1: Write the proportion equation
86,851.13 : 129,327.68 = 83,659.05 : x - Step 2: Convert to fraction form
86,851.13/129,327.68 = 83,659.05/x - Step 3: Cross multiply
86,851.13x = 129,327.68 × 83,659.05 - Step 4: Simplify right side
86,851.13x = 10,819,430,429.21 - Step 5: Solve for x
x = 10,819,430,429.21/86,851.13 - Step 6: Final answer
x = 124,574.44
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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.