Finding the Fourth Proportional to 128,772.16, 193,120.80 and 49,868.80
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Solution
The fourth proportional to 128,772.16, 193,120.80 and 49,868.80 is: 74,788.70
Step by Step Solution
- Step 1: Write the proportion equation
128,772.16 : 193,120.80 = 49,868.80 : x - Step 2: Convert to fraction form
128,772.16/193,120.80 = 49,868.80/x - Step 3: Cross multiply
128,772.16x = 193,120.80 × 49,868.80 - Step 4: Simplify right side
128,772.16x = 9,630,702,551.04 - Step 5: Solve for x
x = 9,630,702,551.04/128,772.16 - Step 6: Final answer
x = 74,788.70
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1.5x scale
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.