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Finding the Fourth Proportional to 123,003.60, 184,505.40 and 81,013.20

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Solution

The fourth proportional to 123,003.60, 184,505.40 and 81,013.20 is: 121,519.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,003.60 : 184,505.40 = 81,013.20 : x
  2. Step 2: Convert to fraction form
    123,003.60/184,505.40 = 81,013.20/x
  3. Step 3: Cross multiply
    123,003.60x = 184,505.40 × 81,013.20
  4. Step 4: Simplify right side
    123,003.60x = 14,947,372,871.28
  5. Step 5: Solve for x
    x = 14,947,372,871.28/123,003.60
  6. Step 6: Final answer
    x = 121,519.80

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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.