Finding the Fourth Proportional to 154,197,506.81, 212,758,136.99 and 91,441,715.10
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Solution
The fourth proportional to 154,197,506.81, 212,758,136.99 and 91,441,715.10 is: 126,169,153.77
Step by Step Solution
- Step 1: Write the proportion equation
154,197,506.81 : 212,758,136.99 = 91,441,715.10 : x - Step 2: Convert to fraction form
154,197,506.81/212,758,136.99 = 91,441,715.10/x - Step 3: Cross multiply
154,197,506.81x = 212,758,136.99 × 91,441,715.10 - Step 4: Simplify right side
154,197,506.81x = 19,454,968,947,389,144 - Step 5: Solve for x
x = 19,454,968,947,389,144/154,197,506.81 - Step 6: Final answer
x = 126,169,153.77
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1.5x scale
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.