Finding the Fourth Proportional to 77,211.60, 115,671.60 and 39,643.80
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Solution
The fourth proportional to 77,211.60, 115,671.60 and 39,643.80 is: 59,390.84
Step by Step Solution
- Step 1: Write the proportion equation
77,211.60 : 115,671.60 = 39,643.80 : x - Step 2: Convert to fraction form
77,211.60/115,671.60 = 39,643.80/x - Step 3: Cross multiply
77,211.60x = 115,671.60 × 39,643.80 - Step 4: Simplify right side
77,211.60x = 4,585,661,776.08 - Step 5: Solve for x
x = 4,585,661,776.08/77,211.60 - Step 6: Final answer
x = 59,390.84
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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.