Finding the Fourth Proportional to 427,918,801.20, 641,878,201.80 and 121,206,922.80
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Solution
The fourth proportional to 427,918,801.20, 641,878,201.80 and 121,206,922.80 is: 181,810,384.20
Step by Step Solution
- Step 1: Write the proportion equation
427,918,801.20 : 641,878,201.80 = 121,206,922.80 : x - Step 2: Convert to fraction form
427,918,801.20/641,878,201.80 = 121,206,922.80/x - Step 3: Cross multiply
427,918,801.20x = 641,878,201.80 × 121,206,922.80 - Step 4: Simplify right side
427,918,801.20x = 77,800,081,652,575,408 - Step 5: Solve for x
x = 77,800,081,652,575,408/427,918,801.20 - Step 6: Final answer
x = 181,810,384.20
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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.