Finding the Fourth Proportional to 76,968,900.80, 115,438,916.80 and 38,620,118.24
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Solution
The fourth proportional to 76,968,900.80, 115,438,916.80 and 38,620,118.24 is: 57,922,934.72
Step by Step Solution
- Step 1: Write the proportion equation
76,968,900.80 : 115,438,916.80 = 38,620,118.24 : x - Step 2: Convert to fraction form
76,968,900.80/115,438,916.80 = 38,620,118.24/x - Step 3: Cross multiply
76,968,900.80x = 115,438,916.80 × 38,620,118.24 - Step 4: Simplify right side
76,968,900.80x = 4,458,264,616,313,522.50 - Step 5: Solve for x
x = 4,458,264,616,313,522.50/76,968,900.80 - Step 6: Final answer
x = 57,922,934.72
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.