Finding the Fourth Proportional to 72,442,102.24, 99,970,822.32 and 39,403,120
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Solution
The fourth proportional to 72,442,102.24, 99,970,822.32 and 39,403,120 is: 54,376,697.89
Step by Step Solution
- Step 1: Write the proportion equation
72,442,102.24 : 99,970,822.32 = 39,403,120 : x - Step 2: Convert to fraction form
72,442,102.24/99,970,822.32 = 39,403,120/x - Step 3: Cross multiply
72,442,102.24x = 99,970,822.32 × 39,403,120 - Step 4: Simplify right side
72,442,102.24x = 3,939,162,308,373,638 - Step 5: Solve for x
x = 3,939,162,308,373,638/72,442,102.24 - Step 6: Final answer
x = 54,376,697.89
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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.