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Finding the Fourth Proportional to 123,266.60, 184,972.80 and 81,268.10

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Solution

The fourth proportional to 123,266.60, 184,972.80 and 81,268.10 is: 121,950.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,266.60 : 184,972.80 = 81,268.10 : x
  2. Step 2: Convert to fraction form
    123,266.60/184,972.80 = 81,268.10/x
  3. Step 3: Cross multiply
    123,266.60x = 184,972.80 × 81,268.10
  4. Step 4: Simplify right side
    123,266.60x = 15,032,388,007.68
  5. Step 5: Solve for x
    x = 15,032,388,007.68/123,266.60
  6. Step 6: Final answer
    x = 121,950.21

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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.