Finding the Fourth Proportional to 129,331,553.88, 178,450,901.36 and 74,316,781.56
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Solution
The fourth proportional to 129,331,553.88, 178,450,901.36 and 74,316,781.56 is: 102,541,848.90
Step by Step Solution
- Step 1: Write the proportion equation
129,331,553.88 : 178,450,901.36 = 74,316,781.56 : x - Step 2: Convert to fraction form
129,331,553.88/178,450,901.36 = 74,316,781.56/x - Step 3: Cross multiply
129,331,553.88x = 178,450,901.36 × 74,316,781.56 - Step 4: Simplify right side
129,331,553.88x = 13,261,896,655,556,228 - Step 5: Solve for x
x = 13,261,896,655,556,228/129,331,553.88 - Step 6: Final answer
x = 102,541,848.90
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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.