Finding the Fourth Proportional to 157,640,790.76, 217,539,927.84 and 87,075,136.24
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Solution
The fourth proportional to 157,640,790.76, 217,539,927.84 and 87,075,136.24 is: 120,161,277.82
Step by Step Solution
- Step 1: Write the proportion equation
157,640,790.76 : 217,539,927.84 = 87,075,136.24 : x - Step 2: Convert to fraction form
157,640,790.76/217,539,927.84 = 87,075,136.24/x - Step 3: Cross multiply
157,640,790.76x = 217,539,927.84 × 87,075,136.24 - Step 4: Simplify right side
157,640,790.76x = 18,942,318,854,307,768 - Step 5: Solve for x
x = 18,942,318,854,307,768/157,640,790.76 - Step 6: Final answer
x = 120,161,277.82
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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.