Home / 81,189,605.40-121,784,408.10-73,127,448.60

Finding the Fourth Proportional to 81,189,605.40, 121,784,408.10 and 73,127,448.60

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Solution

The fourth proportional to 81,189,605.40, 121,784,408.10 and 73,127,448.60 is: 109,691,172.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,189,605.40 : 121,784,408.10 = 73,127,448.60 : x
  2. Step 2: Convert to fraction form
    81,189,605.40/121,784,408.10 = 73,127,448.60/x
  3. Step 3: Cross multiply
    81,189,605.40x = 121,784,408.10 × 73,127,448.60
  4. Step 4: Simplify right side
    81,189,605.40x = 8,905,783,043,614,172
  5. Step 5: Solve for x
    x = 8,905,783,043,614,172/81,189,605.40
  6. Step 6: Final answer
    x = 109,691,172.90

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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.