Finding the Fourth Proportional to 78,009,175.80, 117,013,763.70 and 39,745,423.80
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Solution
The fourth proportional to 78,009,175.80, 117,013,763.70 and 39,745,423.80 is: 59,618,135.70
Step by Step Solution
- Step 1: Write the proportion equation
78,009,175.80 : 117,013,763.70 = 39,745,423.80 : x - Step 2: Convert to fraction form
78,009,175.80/117,013,763.70 = 39,745,423.80/x - Step 3: Cross multiply
78,009,175.80x = 117,013,763.70 × 39,745,423.80 - Step 4: Simplify right side
78,009,175.80x = 4,650,761,628,689,556 - Step 5: Solve for x
x = 4,650,761,628,689,556/78,009,175.80 - Step 6: Final answer
x = 59,618,135.70
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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.