Home / 81,193,015.10-121,550,374.20-76,463,190.20

Finding the Fourth Proportional to 81,193,015.10, 121,550,374.20 and 76,463,190.20

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Solution

The fourth proportional to 81,193,015.10, 121,550,374.20 and 76,463,190.20 is: 114,469,568.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,193,015.10 : 121,550,374.20 = 76,463,190.20 : x
  2. Step 2: Convert to fraction form
    81,193,015.10/121,550,374.20 = 76,463,190.20/x
  3. Step 3: Cross multiply
    81,193,015.10x = 121,550,374.20 × 76,463,190.20
  4. Step 4: Simplify right side
    81,193,015.10x = 9,294,129,381,335,774
  5. Step 5: Solve for x
    x = 9,294,129,381,335,774/81,193,015.10
  6. Step 6: Final answer
    x = 114,469,568.22

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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.