Finding the Fourth Proportional to 128,643.18, 192,983.43 and 39,903.81
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Solution
The fourth proportional to 128,643.18, 192,983.43 and 39,903.81 is: 59,861.50
Step by Step Solution
- Step 1: Write the proportion equation
128,643.18 : 192,983.43 = 39,903.81 : x - Step 2: Convert to fraction form
128,643.18/192,983.43 = 39,903.81/x - Step 3: Cross multiply
128,643.18x = 192,983.43 × 39,903.81 - Step 4: Simplify right side
128,643.18x = 7,700,774,123.87 - Step 5: Solve for x
x = 7,700,774,123.87/128,643.18 - Step 6: Final answer
x = 59,861.50
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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.