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Finding the Fourth Proportional to 123,020.20, 184,616.70 and 78,754.60

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Solution

The fourth proportional to 123,020.20, 184,616.70 and 78,754.60 is: 118,187.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,020.20 : 184,616.70 = 78,754.60 : x
  2. Step 2: Convert to fraction form
    123,020.20/184,616.70 = 78,754.60/x
  3. Step 3: Cross multiply
    123,020.20x = 184,616.70 × 78,754.60
  4. Step 4: Simplify right side
    123,020.20x = 14,539,414,361.82
  5. Step 5: Solve for x
    x = 14,539,414,361.82/123,020.20
  6. Step 6: Final answer
    x = 118,187.21

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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.