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Finding the Fourth Proportional to 139,801,748.31, 192,909,572.56 and 80,259,762.97

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Solution

The fourth proportional to 139,801,748.31, 192,909,572.56 and 80,259,762.97 is: 110,748,805.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,801,748.31 : 192,909,572.56 = 80,259,762.97 : x
  2. Step 2: Convert to fraction form
    139,801,748.31/192,909,572.56 = 80,259,762.97/x
  3. Step 3: Cross multiply
    139,801,748.31x = 192,909,572.56 × 80,259,762.97
  4. Step 4: Simplify right side
    139,801,748.31x = 15,482,876,568,651,078
  5. Step 5: Solve for x
    x = 15,482,876,568,651,078/139,801,748.31
  6. Step 6: Final answer
    x = 110,748,805.05

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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.