Finding the Fourth Proportional to 128,973.52, 193,434.36 and 40,212.64
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Solution
The fourth proportional to 128,973.52, 193,434.36 and 40,212.64 is: 60,310.88
Step by Step Solution
- Step 1: Write the proportion equation
128,973.52 : 193,434.36 = 40,212.64 : x - Step 2: Convert to fraction form
128,973.52/193,434.36 = 40,212.64/x - Step 3: Cross multiply
128,973.52x = 193,434.36 × 40,212.64 - Step 4: Simplify right side
128,973.52x = 7,778,506,282.31 - Step 5: Solve for x
x = 7,778,506,282.31/128,973.52 - Step 6: Final answer
x = 60,310.88
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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.