Finding the Fourth Proportional to 128,896.58, 193,421.42 and 69,730.94
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Solution
The fourth proportional to 128,896.58, 193,421.42 and 69,730.94 is: 104,637.82
Step by Step Solution
- Step 1: Write the proportion equation
128,896.58 : 193,421.42 = 69,730.94 : x - Step 2: Convert to fraction form
128,896.58/193,421.42 = 69,730.94/x - Step 3: Cross multiply
128,896.58x = 193,421.42 × 69,730.94 - Step 4: Simplify right side
128,896.58x = 13,487,457,432.73 - Step 5: Solve for x
x = 13,487,457,432.73/128,896.58 - Step 6: Final answer
x = 104,637.82
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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.