Home / 123,155.21-184,439.57-78,644.09

Finding the Fourth Proportional to 123,155.21, 184,439.57 and 78,644.09

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Solution

The fourth proportional to 123,155.21, 184,439.57 and 78,644.09 is: 117,778.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,155.21 : 184,439.57 = 78,644.09 : x
  2. Step 2: Convert to fraction form
    123,155.21/184,439.57 = 78,644.09/x
  3. Step 3: Cross multiply
    123,155.21x = 184,439.57 × 78,644.09
  4. Step 4: Simplify right side
    123,155.21x = 14,505,080,827.22
  5. Step 5: Solve for x
    x = 14,505,080,827.22/123,155.21
  6. Step 6: Final answer
    x = 117,778.87

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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.