Finding the Fourth Proportional to 129,446,539.40, 194,169,809.10 and 78,651,633.80
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Solution
The fourth proportional to 129,446,539.40, 194,169,809.10 and 78,651,633.80 is: 117,977,450.70
Step by Step Solution
- Step 1: Write the proportion equation
129,446,539.40 : 194,169,809.10 = 78,651,633.80 : x - Step 2: Convert to fraction form
129,446,539.40/194,169,809.10 = 78,651,633.80/x - Step 3: Cross multiply
129,446,539.40x = 194,169,809.10 × 78,651,633.80 - Step 4: Simplify right side
129,446,539.40x = 15,271,772,720,349,106 - Step 5: Solve for x
x = 15,271,772,720,349,106/129,446,539.40 - Step 6: Final answer
x = 117,977,450.70
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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.