Finding the Fourth Proportional to 129,489,705.74, 178,698,198.67 and 70,756,175.03
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Solution
The fourth proportional to 129,489,705.74, 178,698,198.67 and 70,756,175.03 is: 97,644,835.54
Step by Step Solution
- Step 1: Write the proportion equation
129,489,705.74 : 178,698,198.67 = 70,756,175.03 : x - Step 2: Convert to fraction form
129,489,705.74/178,698,198.67 = 70,756,175.03/x - Step 3: Cross multiply
129,489,705.74x = 178,698,198.67 × 70,756,175.03 - Step 4: Simplify right side
129,489,705.74x = 12,644,001,021,569,852 - Step 5: Solve for x
x = 12,644,001,021,569,852/129,489,705.74 - Step 6: Final answer
x = 97,644,835.54
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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.