Home / 123,138.20-184,415.70-83,480.60

Finding the Fourth Proportional to 123,138.20, 184,415.70 and 83,480.60

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Solution

The fourth proportional to 123,138.20, 184,415.70 and 83,480.60 is: 125,023.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,138.20 : 184,415.70 = 83,480.60 : x
  2. Step 2: Convert to fraction form
    123,138.20/184,415.70 = 83,480.60/x
  3. Step 3: Cross multiply
    123,138.20x = 184,415.70 × 83,480.60
  4. Step 4: Simplify right side
    123,138.20x = 15,395,133,285.42
  5. Step 5: Solve for x
    x = 15,395,133,285.42/123,138.20
  6. Step 6: Final answer
    x = 125,023.21

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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.