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Finding the Fourth Proportional to 123,235.20, 184,998.60 and 69,969.60

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Solution

The fourth proportional to 123,235.20, 184,998.60 and 69,969.60 is: 105,037.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,235.20 : 184,998.60 = 69,969.60 : x
  2. Step 2: Convert to fraction form
    123,235.20/184,998.60 = 69,969.60/x
  3. Step 3: Cross multiply
    123,235.20x = 184,998.60 × 69,969.60
  4. Step 4: Simplify right side
    123,235.20x = 12,944,278,042.56
  5. Step 5: Solve for x
    x = 12,944,278,042.56/123,235.20
  6. Step 6: Final answer
    x = 105,037.18

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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.