Finding the Fourth Proportional to 128,817.80, 180,467.80 and 128,817.80
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Solution
The fourth proportional to 128,817.80, 180,467.80 and 128,817.80 is: 180,467.80
Step by Step Solution
- Step 1: Write the proportion equation
128,817.80 : 180,467.80 = 128,817.80 : x - Step 2: Convert to fraction form
128,817.80/180,467.80 = 128,817.80/x - Step 3: Cross multiply
128,817.80x = 180,467.80 × 128,817.80 - Step 4: Simplify right side
128,817.80x = 23,247,464,966.84 - Step 5: Solve for x
x = 23,247,464,966.84/128,817.80 - Step 6: Final answer
x = 180,467.80
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Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.