Finding the Fourth Proportional to 128,905.20, 193,357.80 and 93,913.20
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Solution
The fourth proportional to 128,905.20, 193,357.80 and 93,913.20 is: 140,869.80
Step by Step Solution
- Step 1: Write the proportion equation
128,905.20 : 193,357.80 = 93,913.20 : x - Step 2: Convert to fraction form
128,905.20/193,357.80 = 93,913.20/x - Step 3: Cross multiply
128,905.20x = 193,357.80 × 93,913.20 - Step 4: Simplify right side
128,905.20x = 18,158,849,742.96 - Step 5: Solve for x
x = 18,158,849,742.96/128,905.20 - Step 6: Final answer
x = 140,869.80
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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.