Finding the Fourth Proportional to 129,331,603.56, 178,450,970.34 and 74,316,831.24
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Solution
The fourth proportional to 129,331,603.56, 178,450,970.34 and 74,316,831.24 is: 102,541,917.69
Step by Step Solution
- Step 1: Write the proportion equation
129,331,603.56 : 178,450,970.34 = 74,316,831.24 : x - Step 2: Convert to fraction form
129,331,603.56/178,450,970.34 = 74,316,831.24/x - Step 3: Cross multiply
129,331,603.56x = 178,450,970.34 × 74,316,831.24 - Step 4: Simplify right side
129,331,603.56x = 13,261,910,647,372,024 - Step 5: Solve for x
x = 13,261,910,647,372,024/129,331,603.56 - Step 6: Final answer
x = 102,541,917.69
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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.