Finding the Fourth Proportional to 128,643,622.40, 180,578,828.80 and 128,643,622.40
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Solution
The fourth proportional to 128,643,622.40, 180,578,828.80 and 128,643,622.40 is: 180,578,828.80
Step by Step Solution
- Step 1: Write the proportion equation
128,643,622.40 : 180,578,828.80 = 128,643,622.40 : x - Step 2: Convert to fraction form
128,643,622.40/180,578,828.80 = 128,643,622.40/x - Step 3: Cross multiply
128,643,622.40x = 180,578,828.80 × 128,643,622.40 - Step 4: Simplify right side
128,643,622.40x = 23,230,314,665,581,448 - Step 5: Solve for x
x = 23,230,314,665,581,448/128,643,622.40 - Step 6: Final answer
x = 180,578,828.80
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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.