Finding the Fourth Proportional to 128,265.39, 192,423.29 and 39,503.79
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Solution
The fourth proportional to 128,265.39, 192,423.29 and 39,503.79 is: 59,263.45
Step by Step Solution
- Step 1: Write the proportion equation
128,265.39 : 192,423.29 = 39,503.79 : x - Step 2: Convert to fraction form
128,265.39/192,423.29 = 39,503.79/x - Step 3: Cross multiply
128,265.39x = 192,423.29 × 39,503.79 - Step 4: Simplify right side
128,265.39x = 7,601,449,041.75 - Step 5: Solve for x
x = 7,601,449,041.75/128,265.39 - Step 6: Final answer
x = 59,263.45
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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.