Finding the Fourth Proportional to 128,997,639.60, 181,106,878.80 and 128,997,639.60
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Solution
The fourth proportional to 128,997,639.60, 181,106,878.80 and 128,997,639.60 is: 181,106,878.80
Step by Step Solution
- Step 1: Write the proportion equation
128,997,639.60 : 181,106,878.80 = 128,997,639.60 : x - Step 2: Convert to fraction form
128,997,639.60/181,106,878.80 = 128,997,639.60/x - Step 3: Cross multiply
128,997,639.60x = 181,106,878.80 × 128,997,639.60 - Step 4: Simplify right side
128,997,639.60x = 23,362,359,880,523,280 - Step 5: Solve for x
x = 23,362,359,880,523,280/128,997,639.60 - Step 6: Final answer
x = 181,106,878.80
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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.