Finding the Fourth Proportional to 85,781.28, 128,529.63 and 60,696.99
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Solution
The fourth proportional to 85,781.28, 128,529.63 and 60,696.99 is: 90,944.80
Step by Step Solution
- Step 1: Write the proportion equation
85,781.28 : 128,529.63 = 60,696.99 : x - Step 2: Convert to fraction form
85,781.28/128,529.63 = 60,696.99/x - Step 3: Cross multiply
85,781.28x = 128,529.63 × 60,696.99 - Step 4: Simplify right side
85,781.28x = 7,801,361,666.81 - Step 5: Solve for x
x = 7,801,361,666.81/85,781.28 - Step 6: Final answer
x = 90,944.80
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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.