Finding the Fourth Proportional to 91,320.75, 136,860.84 and 38,665.08
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Solution
The fourth proportional to 91,320.75, 136,860.84 and 38,665.08 is: 57,946.69
Step by Step Solution
- Step 1: Write the proportion equation
91,320.75 : 136,860.84 = 38,665.08 : x - Step 2: Convert to fraction form
91,320.75/136,860.84 = 38,665.08/x - Step 3: Cross multiply
91,320.75x = 136,860.84 × 38,665.08 - Step 4: Simplify right side
91,320.75x = 5,291,735,327.47 - Step 5: Solve for x
x = 5,291,735,327.47/91,320.75 - Step 6: Final answer
x = 57,946.69
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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.