Home / 85,977.21-128,845.68-73,260.54

Finding the Fourth Proportional to 85,977.21, 128,845.68 and 73,260.54

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Solution

The fourth proportional to 85,977.21, 128,845.68 and 73,260.54 is: 109,788.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,977.21 : 128,845.68 = 73,260.54 : x
  2. Step 2: Convert to fraction form
    85,977.21/128,845.68 = 73,260.54/x
  3. Step 3: Cross multiply
    85,977.21x = 128,845.68 × 73,260.54
  4. Step 4: Simplify right side
    85,977.21x = 9,439,304,093.47
  5. Step 5: Solve for x
    x = 9,439,304,093.47/85,977.21
  6. Step 6: Final answer
    x = 109,788.44

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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.