Finding the Fourth Proportional to 76,989,907.42, 106,210,457.99 and 68,178,338.62
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Solution
The fourth proportional to 76,989,907.42, 106,210,457.99 and 68,178,338.62 is: 94,054,569.13
Step by Step Solution
- Step 1: Write the proportion equation
76,989,907.42 : 106,210,457.99 = 68,178,338.62 : x - Step 2: Convert to fraction form
76,989,907.42/106,210,457.99 = 68,178,338.62/x - Step 3: Cross multiply
76,989,907.42x = 106,210,457.99 × 68,178,338.62 - Step 4: Simplify right side
76,989,907.42x = 7,241,252,569,476,756 - Step 5: Solve for x
x = 7,241,252,569,476,756/76,989,907.42 - Step 6: Final answer
x = 94,054,569.13
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.