Finding the Fourth Proportional to 128,497.74, 192,828.87 and 69,374.58
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Solution
The fourth proportional to 128,497.74, 192,828.87 and 69,374.58 is: 104,106.28
Step by Step Solution
- Step 1: Write the proportion equation
128,497.74 : 192,828.87 = 69,374.58 : x - Step 2: Convert to fraction form
128,497.74/192,828.87 = 69,374.58/x - Step 3: Cross multiply
128,497.74x = 192,828.87 × 69,374.58 - Step 4: Simplify right side
128,497.74x = 13,377,421,868.12 - Step 5: Solve for x
x = 13,377,421,868.12/128,497.74 - Step 6: Final answer
x = 104,106.28
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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.