Finding the Fourth Proportional to 81,673,277.10, 122,509,915.65 and 74,115,005.10
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Solution
The fourth proportional to 81,673,277.10, 122,509,915.65 and 74,115,005.10 is: 111,172,507.65
Step by Step Solution
- Step 1: Write the proportion equation
81,673,277.10 : 122,509,915.65 = 74,115,005.10 : x - Step 2: Convert to fraction form
81,673,277.10/122,509,915.65 = 74,115,005.10/x - Step 3: Cross multiply
81,673,277.10x = 122,509,915.65 × 74,115,005.10 - Step 4: Simplify right side
81,673,277.10x = 9,079,823,023,200,320 - Step 5: Solve for x
x = 9,079,823,023,200,320/81,673,277.10 - Step 6: Final answer
x = 111,172,507.65
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1.5x scale
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.