Finding the Fourth Proportional to 154,115,809.24, 212,689,371.90 and 85,438,177.24
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Solution
The fourth proportional to 154,115,809.24, 212,689,371.90 and 85,438,177.24 is: 117,909,981.74
Step by Step Solution
- Step 1: Write the proportion equation
154,115,809.24 : 212,689,371.90 = 85,438,177.24 : x - Step 2: Convert to fraction form
154,115,809.24/212,689,371.90 = 85,438,177.24/x - Step 3: Cross multiply
154,115,809.24x = 212,689,371.90 × 85,438,177.24 - Step 4: Simplify right side
154,115,809.24x = 18,171,792,253,456,476 - Step 5: Solve for x
x = 18,171,792,253,456,476/154,115,809.24 - Step 6: Final answer
x = 117,909,981.74
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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.