Finding the Fourth Proportional to 81,430.57, 121,965.40 and 62,571.79
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Solution
The fourth proportional to 81,430.57, 121,965.40 and 62,571.79 is: 93,719.02
Step by Step Solution
- Step 1: Write the proportion equation
81,430.57 : 121,965.40 = 62,571.79 : x - Step 2: Convert to fraction form
81,430.57/121,965.40 = 62,571.79/x - Step 3: Cross multiply
81,430.57x = 121,965.40 × 62,571.79 - Step 4: Simplify right side
81,430.57x = 7,631,593,396.07 - Step 5: Solve for x
x = 7,631,593,396.07/81,430.57 - Step 6: Final answer
x = 93,719.02
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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.