Finding the Fourth Proportional to 77,081,982.96, 106,379,863.62 and 42,281,399.40
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Solution
The fourth proportional to 77,081,982.96, 106,379,863.62 and 42,281,399.40 is: 58,352,021.17
Step by Step Solution
- Step 1: Write the proportion equation
77,081,982.96 : 106,379,863.62 = 42,281,399.40 : x - Step 2: Convert to fraction form
77,081,982.96/106,379,863.62 = 42,281,399.40/x - Step 3: Cross multiply
77,081,982.96x = 106,379,863.62 × 42,281,399.40 - Step 4: Simplify right side
77,081,982.96x = 4,497,889,501,834,750 - Step 5: Solve for x
x = 4,497,889,501,834,750/77,081,982.96 - Step 6: Final answer
x = 58,352,021.17
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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.