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Finding the Fourth Proportional to 168,503,843.80, 252,755,765.70 and 77,804,579.80

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Solution

The fourth proportional to 168,503,843.80, 252,755,765.70 and 77,804,579.80 is: 116,706,869.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,503,843.80 : 252,755,765.70 = 77,804,579.80 : x
  2. Step 2: Convert to fraction form
    168,503,843.80/252,755,765.70 = 77,804,579.80/x
  3. Step 3: Cross multiply
    168,503,843.80x = 252,755,765.70 × 77,804,579.80
  4. Step 4: Simplify right side
    168,503,843.80x = 19,665,556,142,315,752
  5. Step 5: Solve for x
    x = 19,665,556,142,315,752/168,503,843.80
  6. Step 6: Final answer
    x = 116,706,869.70

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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.